HolobiomicsLab
- 7.4k skills
- 0 followers
- 1 day ago last updated
- ▌ Gnn Architecture Design For Molecular Graphs · holobiomicslabUse when when you have preprocessed molecular graph data (node and edge tensors representing atoms and bonds) and need to train a regression model to predict a continuous molecular property (e.g., LC retention time).
- ▌ Graph Based Metabolite Similarity Assessment · holobiomicslabUse when you have a collection of MS/MS spectra (stored as Spectrum2 objects in an ms2Lib class) and need to identify which spectra share identical fragmentation patterns—particularly when coupled to a GNPS molecular network to focus on explaining network components (connected components, cliques.
- ▌ Ion Mobility Saturation Detection And Repair · holobiomicslabUse when preprocessing raw Agilent MassHunter (.d) or UIMF IM-MS data files that exhibit signal saturation—ion intensity clipping caused by detector or amplifier limits—which distorts peak shape and abundance estimates across the m/z and drift-time axes.
- ▌ Lcims Msms Data Preprocessing Peak Detection · holobiomicslabUse when you have loaded mzML.gz or HDF5-formatted raw LC-IMS-MS/MS data and need to identify discrete peaks before feature alignment. Use it if your goal is to reduce noise, increase signal-to-noise ratio, and prepare multi-dimensional data for cross-sample feature matching and CCS calibration.
- ▌ Linear Regression Fitting For Chromatography · holobiomicslabUse when you have extracted retention times at peak maxima (rtFittedAPEX) from extracted-ion chromatograms (XICs) of known internal RT calibrants (e.
- ▌ Log Transform Normalization For Metabolomics · holobiomicslabUse when after chromatographic peak detection, fill-in of missing peaks, and retention-time-based grouping in LC-MS metabolomics workflows, apply log2 transformation when refining feature groups using correlation of abundances across samples.
- ▌ Mass Spectrometry Data Constraint Validation · holobiomicslabUse when implementing replacement methods ($<-, [<-, spectraData<-, mz<-, intensity<-, peaksData<-) for a writable MsBackend subclass, or when modifying peak data in an existing backend.
- ▌ Mass Spectrometry Feature Extraction Ms1 Ms2 · holobiomicslabUse when when you have raw mzML files from LC-MS/MS metabolomics experiments and need to convert them into a structured feature table with accurate mass, retention time, and MS2 spectral data linked to a reference compound list.
- ▌ Mass Spectrometry Feature Table Construction · holobiomicslabUse when you have vendor-independent centroided mzML files from LC- or GC-HRMS data acquired in data-dependent acquisition (ddMS2) mode and need to extract detected features with m/z, retention time, and intensity attributes as input for non-target screening or PFAS prioritization workflows.
- ▌ Mass Spectrometry Quality Metrics Extraction · holobiomicslabUse when you have centroided .mzML LC–MS data, a validated target compound list with adjusted expected retention times (e.g., after a screening mode run), and need to quantify peak quality and integration reliability across multiple sample runs to support metabolomics or lipidomics workflows.
- ▌ Mass Spectrometry Reference Standard Mapping · holobiomicslabUse when you have acquired tunemix data (positive or negative ion mode, in .h5 format) with known CCS reference values and need to construct a calibration function that will later predict CCS values for unknown analytes.
- ▌ Mass Spectrometry Spectrum Quality Filtering · holobiomicslabUse when compiling or harmonizing MS/MS spectral libraries from multiple source repositories and you need to identify and remove spectra that fail quality thresholds (low resolution, precursor-fragment mass inconsistency, duplicate fragment patterns, noise-dominated, or missing critical metadata.
- ▌ Mass Spectrometry Transition Data Formatting · holobiomicslabUse when when you have raw mass spectrometry transition data from a triple-quadrupole or other tandem MS instrument and need to prepare it for suspect chemical screening using EISA-EXPOSOME, or when merging custom compound libraries into the T3DB format.
- ▌ Mass2motif Probability Distribution Learning · holobiomicslabUse when when you have preprocessed MS/MS spectra converted to a bag-of-fragments format (fragments and neutral losses extracted, noise filtered) and you seek to discover recurring fragmentation patterns without prior compound identification.
- ▌ Metabolite Feature Association Across Labels · holobiomicslabUse when after PuInc_seeker has identified putative incorporations (m/z features showing significant fold-change and p-value signals between labeled and unlabeled sample groups) and you need to assign base peaks—the most intense isotopologue signals—and validate isotope-pair mass gaps match.
- ▌ Metabolite Feature Correspondence Validation · holobiomicslabUse when after m/z grouping and pairwise alignment detection when you have a metabCombiner object containing candidate feature pair alignments and need to select a subset of mutually abundant, high-confidence anchors to anchor a nonlinear retention time mapping spline.
- ▌ Metabolite Structural Annotation Integration · holobiomicslabUse when after statistical analysis (e.g., MB-PLS with permutation testing) has identified a subset of significant LC-MS features (p < 0.05 or similar threshold) that require structural interpretation.
- ▌ Metabolomic Molecular Family Networking Gnps · holobiomicslabUse when when you have untargeted LC-MS/MS spectral data from microbial or environmental samples and aim to group related metabolites into molecular families for natural product discovery, especially when integrating with genomic biosynthetic gene cluster (BGC) annotations to link chemistry to.
- ▌ Metabolomics Feature Intensity Normalization · holobiomicslabUse when after peak detection and feature table construction (rows = features, columns = samples with intensity values) and before applying intensity-based filters (e.g., fold-change, phenotype score) or when preparing data for dashboard visualization.
- ▌ Metabolomics Quantification Table Processing · holobiomicslabUse when you have a quantification table (rows = metabolite features, columns = samples with abundance values), corresponding metadata table (sample annotations, groupings), and spectral data files, and you need to produce a unified JSON dashboard artifact that can be loaded into an interactive.
- ▌ Microbe Metabolite Prediction Neural Network · holobiomicslabUse when you have paired microbiome (16S or metagenomic taxonomy/functions at genus or finer level) and metabolome (LC-MS or similar profiled metabolites) data from the same samples and want to: (1) predict unobserved metabolite abundances from microbiome composition;
- ▌ Missing Value Imputation For Column Metadata · holobiomicslabUse when when preparing raw HPLC column parameter arrays for featurization into feature vectors for retention time prediction models. Specifically apply this skill when column metadata contains empty strings (indicating missing diameter or pH values) or non-standard string encodings (e.g., '2.
- ▌ Missing Value Replacement By Feature Minimum · holobiomicslabUse when after loading a feature table into memory when the table contains zero or missing values that represent true signal loss (not genuine absence), and you need to impute them before normalization, batch correction, or statistical analysis.
- ▌ Molecular Formula Computation From Structure · holobiomicslabUse when processing tandem MS/MS libraries in mgf format (such as GNPS) that lack a Molecular Formula (MF) field but contain valid SMILES strings. The computed formulas are required before combining libraries or writing them to msp format for MS-DIAL compatibility.
- ▌ Classification Performance Metric Evaluation · holobiomicslabUse when after training multiple classifiers (traditional ML and deep learning) on a preprocessed metabolomics feature matrix with labeled samples, and you need to quantify and compare their predictive performance to select the model or ensemble for downstream analysis.
- ▌ Cross Member Metabolic Dependency Resolution · holobiomicslabUse when when you have consensus metabolic reconstructions for multiple community members (e.
- ▌ Cross Platform Reproducibility Configuration · holobiomicslabUse when when you have documented pinned package versions for a Python-based scientific implementation (e.g., from a README or project documentation) and need to distribute a reproducible computational environment to other users or CI/CD systems.
- ▌ Cyp450 Metabolite Prediction API Integration · holobiomicslabUse when you need to embed CYP450 metabolite prediction directly into a larger Java software pipeline or require dynamic toggling of the CypReact filter module based on experimental parameters.
- ▌ Data Format Conversion To Application Schema · holobiomicslabUse when you have m/z peak lists (positive and negative mode) and sample metadata from peak-picking software (e.g., XCMS with MetaboAnalyst export, MSnbase, or MetaboLights format) and need to load them into MetaboShiny for compound identification, statistical analysis, or machine learning.
- ▌ Dependency Resolution For Build Environments · holobiomicslabUse when when preparing to build LipidSpace or similar desktop/CLI applications from source across multiple target platforms (Windows 10, Ubuntu 22.04, macOS 12+ ARM64), or when encountering build failures due to missing headers, libraries, or incompatible tool versions.
- ▌ Deployment Mode Detection And Fallback Logic · holobiomicslabUse when building a Streamlit application that must support both cloud deployments (with Redis task queuing) and local/offline execution (with multiprocessing), and you need to automatically select the execution path without requiring separate code paths or manual configuration switches at runtime.
- ▌ Diagnostic Plot Generation For Batch Effects · holobiomicslabUse when after loading log-transformed metabolomics feature abundance tables (samples as rows, metabolic features as columns) with batch identifiers, and before committing to a single batch-correction model.
- ▌ Directional Effect Assignment Across Studies · holobiomicslabUse when you have harmonized metabolite results from multiple independent studies, each with fold-change or trend classification data but no variance/standard deviation, and you need to produce a qualitative consensus on directionality for each compound.
- ▌ Duplicate Record Detection And Deduplication · holobiomicslabUse when when merging metabolomic data from multiple studies, you have compound identifiers in heterogeneous formats (chemical names, InChI, InChIKey, SMILES) and need to detect whether the same compound appears under different representations.
- ▌ Feature Matrix Preparation Mass Spectrometry · holobiomicslabUse when when you have raw mass spectrometry spectral data (peak intensities across m/z values) and need to feed it into MLP or GNN models for metabolite annotation, or when you need to generate LDA topic labels as auxiliary multi-task learning targets.
- ▌ Feature Metadata Alignment Across Dimensions · holobiomicslabUse when you have loaded a feature-by-pixel intensity matrix from an MSI HDF5 container and need to perform dimension-preserving corrections (e.
- ▌ Ft Icr Ms Data Processing Pipeline Execution · holobiomicslabUse when you have FT-ICR MS peak abundance data in Formularity .
- ▌ Gap Filling And Reaction Conflict Resolution · holobiomicslabUse when when merging multiple draft metabolic models (in JSON, XML, or SBML format) from community members or assembly variants and you encounter conflicting reaction annotations, missing metabolic pathways, or incomplete gap-filling decisions that require arbitration across inputs.
- ▌ Gene Protein Reaction Association Evaluation · holobiomicslabUse when you have a constraint-based metabolic model with embedded GPR rules (AND/OR associations between genes and reactions), paired with quantified gene-expression data (RNA-seq FPKM or read counts per cell line).
- ▌ Imaging Mass Spectrometry Ion Identification · holobiomicslabUse when you have imaging mass spectrometry data from spatial metabolomics experiments and need to reduce the high-dimensional peak space to a ranked set of marker ions for downstream spatial analysis (e.g., tissue region annotation or biomarker discovery).
- ▌ In Source Fragment Adduct Candidate Flagging · holobiomicslabUse when you have aligned, imputed time-resolved mass spectrometric data from direct-injection plasma ionization (e.g., DBDI, DESI) without chromatographic separation, and you suspect multiple m/z features belong to the same neutral analyte as in-source fragments or oxygen-bound adducts.
- ▌ Isobaric Ion Misclassification Documentation · holobiomicslabUse when after matrix annotation has been performed on mass spectrometry imaging (MSI) data when you need to identify and document ions whose m/z values overlap with or are isobaric to other peaks, creating risk of false positive or false negative matrix assignments.
- ▌ Linear Regression Design Matrix Construction · holobiomicslabUse when after log-transformation and missing-value imputation of featuredata (via LogTransform and MissingValues functions), when you have normalized metabolomics intensity data and need to identify metabolites associated with specific biological or experimental factors encoded as covariates in a.
- ▌ Mass Spectra Tokenization Unified Vocabulary · holobiomicslabUse when when you have paired mass spectra and molecular structure data and need to train a unified model for structure elucidation. Use this skill at the data preparation stage before pretraining, when you want both modalities to share representational capacity rather than operate in isolation.
- ▌ Mass Spectrometry Intensity Drift Correction · holobiomicslabUse when mS quantification data exhibits intensity drift—a systematic decline or variation in detector response across the run sequence. Intensity drift is particularly common in long measurement sessions and compromises the accuracy of feature-by-sample intensity matrices.
- ▌ Metabolite Database Identifier Normalization · holobiomicslabUse when you have metabolomics metadata in mwTab or tabular format with column headers and values that may contain database identifiers (e.g., HMDB IDs, PubChem CIDs, KEGG compound IDs) in heterogeneous or non-canonical formats (mixed case, optional prefixes, variable naming conventions).
- ▌ Metabolomic Network Edge Type Prioritization · holobiomicslabUse when when your metabolomic network contains multiple edge types (Biochemical, Structural, Mass Spectral, Correlation) between the same node pairs and you want to export a unique-edge network in which each node pair is connected by exactly one edge—the one with highest priority according to the.
- ▌ Metabolomics Feature Detection And Alignment · holobiomicslabUse when you have raw metabolomics mass spectrometry data in mzML or mzXML format and need to extract, align, and normalize metabolic features across multiple samples or conditions.
- ▌ Missing Data Handling In Metabolite Datasets · holobiomicslabUse when when importing metabolomics datasets with multiple studies into amanida_read for quantitative or qualitative meta-analysis, and some studies report missing values for p-values, fold-changes, sample sizes, or other effect size metrics.
- ▌ Multi Factorial Experimental Design Handling · holobiomicslabUse when your lipidomics dataset includes multiple experimental factors (e.
- ▌ Multicontrast Statistical Testing Lipidomics · holobiomicslabUse when after removing outlier samples and confirming data quality through PCA or TIC plots, apply this skill when you need to quantify statistical significance of lipid abundance differences across defined sample groups (e.g., disease vs. control, treatment vs. untreated, cancer stages).
- ▌ Multivariate Metabolomic Statistical Testing · holobiomicslabUse when after WGCNA-derived metabolic modules have been identified and named in a normalized, imputed MultiAssayExperiment object, and you need to test whether specific modules show statistically significant association with a binary or categorical sample grouping (e.
- ▌ Neural Network Early Stopping Implementation · holobiomicslabUse when when training a multilayer perceptron neural network on paired microbiome-metabolome datasets where you have a held-out validation fold (20% of each cross-validation fold) and wish to prevent overfitting without manual epoch selection.
- ▌ Peak Table Imputation Missing Value Handling · holobiomicslabUse when after peak clustering in a GCIMS preprocessing pipeline, when the peak table matrix contains NA values corresponding to peaks detected in some samples but not others, and you have computed cluster statistics that characterize each peak cluster's properties.
- ▌ Ppm Tolerance Filtering In Mass Spectrometry · holobiomicslabUse when when you have assigned molecular formulas to m/z peaks or computed mass differences between peaks in FT-ICR MS data, and you need to distinguish true chemical matches from noise or random coincidences.
- ▌ Python Package Installation Development Mode · holobiomicslabUse when when you have cloned a Python package repository locally and need to test code changes, run the package's test suite, or contribute to development without reinstalling the package after each modification.
- ▌ Quality Control Sample Selection And Marking · holobiomicslabUse when your metabolomics dataset contains samples analyzed across multiple batches or runs, and you have sample-level metadata (sampledata) with a 'type' or classification field. You intend to apply QC-aware normalization methods (e.
- ▌ Quantitative Mode Metabolomics Configuration · holobiomicslabUse when when you have metabolomics results from multiple studies reporting compound identifiers, p-values, fold-changes, and study sizes (N), and you need to prepare them for quantitative meta-analysis using weighted Fisher's method and logarithmic fold-change combination.
- ▌ Rdkit Descriptor And Fingerprint Calculation · holobiomicslabUse when you need to (1) compare structural similarity between generated compounds and target/reference structures using Tanimoto similarity scores, (2) extract molecular descriptors for machine learning models that predict reaction feasibility, (3) implement compound filtering based on chemical.
- ▌ Reaction Activity Score Computation From Gpr · holobiomicslabUse when you have RNA-seq FPKM abundance data for genes across multiple cell lines or samples, a metabolic model with embedded GPR associations, and need to translate differential gene expression into reaction-level constraints for flux prediction.
- ▌ Repository Cloning With Recursive Submodules · holobiomicslabUse when you need to set up a development environment for a project that declares Git submodules (typically listed in .gitmodules), particularly when the build system (qmake, make, Maven, etc.) expects all dependencies to be present in the working tree.
- ▌ Rna Seq Preprocessing Pipeline Orchestration · holobiomicslabUse when when you have raw FASTQ files (from SRA or local storage) and need to produce normalized transcript quantification (quant.sf) files for a multi-sample RNA-seq cohort.
- ▌ Roc Auc Computation For Phenotype Prediction · holobiomicslabUse when you have constructed consensus-clustered microbe and metabolite modules from microbiome-metabolome interaction data and wish to test whether these module-level features have clinically predictive value for a binary phenotype (e.g., disease vs. healthy).
- ▌ Spectra Object Serialization Deserialization · holobiomicslabUse when you have Spectra objects in an R environment and need to apply Python MS algorithms (e.g., matchms similarity scoring, spectrum normalization, or filtering) that operate on Python spectral objects, then return results back to R for further analysis or visualization.
- ▌ Spectral Array Extraction And Reconstruction · holobiomicslabUse when your input is an mzPeak archive (ZIP of Parquet files) and you need to recover spectrum signal data (m/z values and intensities) for downstream analysis, visualization, or format conversion. Use this skill when working with profile or centroid mode spectra stored in `spectra_data.
- ▌ Spectral Similarity Scoring With Mass Shifts · holobiomicslabUse when you have an unknown query spectrum suspected to carry a post-translational modification and need to match it against a library of unmodified reference spectra.
- ▌ Standardized Region Export For Deep Learning · holobiomicslabUse when you have LC-HRMS profile-mode data with detected local maxima (from gradient-descent peak finding) and need to prepare them as input for a convolutional neural network trained to classify peaks vs. background signal or to estimate peak boundaries and centers.
- ▌ Tensor Shape Validation Through Forward Pass · holobiomicslabUse when after assembling a Graphormer backbone with DGL molecular graph encoders, column-parameter embedding layers, and gradient-slope feature concatenation, but before training on the full dataset.
- ▌ Topic Label Validation Distribution Analysis · holobiomicslabUse when after LDA topic inference has assigned dominant topic labels to mass spectra, and before those labels are passed to MLP or GNN multi-task training.
- ▌ Univariate Statistical Output Interpretation · holobiomicslabUse when after running omu_summary (t-test) or omu_anova (ANOVA) on metabolomics count data with a defined contrast (e.g., numerator vs. denominator treatment levels), when you need to filter and visualize metabolites by statistical significance and effect size.
- ▌ W4m Three Table Format Conformance · holobiomicslabUse when moving a feature table between Workflow4Metabolomics tools and the dataMatrix, sampleMetadata and variableMetadata files must agree on identifiers, order and R-name validity before a statistics step silently analyses mislabelled samples.
- ▌ Dask Array Materialization And Collection · holobiomicslabUse when you have performed lazy dask-backed feature extraction on an ImageContainer using im.calculate_image_features and need to persist the computed spatial features into the AnnData object while controlling when and how dask graph computation is triggered.
- ▌ Differential Splicing Statistical Testing · holobiomicslabUse when you have PSI (percent-spliced-in) matrices for multiple samples grouped into two or more biological conditions, along with corresponding transcript expression quantification, and need to identify events or transcripts with statistically significant changes in inclusion levels between.
- ▌ Gene Level Summarization From Transcripts · holobiomicslabUse when you have transcript-level quantification files (salmon quant.sf.gz, kallisto h5, or Sailfish output) and need to perform gene-level differential expression analysis.
- ▌ Multiple Testing Correction Visualization · holobiomicslabUse when after running fgsea() on a preranked gene list and obtaining a results table with raw pval, padj, ES, NES, and size columns, use this skill to: (1) subset results to top enriched pathways (e.g., top 10 upregulated ES > 0 and top 10 downregulated ES < 0 by adjusted p-value);
- ▌ Rna Seq Experimental Design Specification · holobiomicslabUse when before constructing a DESeqDataSet from count data or tximport output, when you have raw RNA-seq samples that need to be annotated with experimental conditions, treatment groups, batch effects, or other covariates.
- ▌ Salmon Quantification Output Verification · holobiomicslabUse when after running salmon quant with the --writeMappings/-z flag to produce SAM output, or when investigating discrepancies between the number of mapped reads reported in quant.sf and the actual number of records written to the output SAM file.
- ▌ Sparse Matrix Verification And Validation · holobiomicslabUse when after calling squidpy.gr.spatial_neighbors or any graph-building operation that outputs sparse matrices to adata.
- ▌ Transcript Abundance Correlation Analysis · holobiomicslabUse when when validating a new or reimplemented quantification tool against a reference implementation on the same dataset and index, or when investigating whether changes to seed representation, chain pruning thresholds, or other algorithmic parameters affect downstream abundance estimates.
- ▌ Uncertainty Aware Significance Assessment · holobiomicslabUse when you have PSI matrices for two or more conditions with replicates per condition, and you need to determine which alternative splicing events show significant changes between conditions while accounting for measurement uncertainty that scales with transcript expression levels.
- ▌ Approximate Nearest Neighbor Index Construction · holobiomicslabUse when when you have a large collection of reference MS/MS spectra (spectral library) and need to search unknown query spectra against it rapidly, particularly for open modification searching where the modification mass is unknown and candidate space is large.
- ▌ Ce Ms Migration Time To Mobility Transformation · holobiomicslabUse when your CE-MS dataset exhibits migration time drift between runs due to electroosmotic flow (EOF) variation, and you have identified two internal mobility markers (e.g., Paracetamol and Procaine) with known charges whose migration times can be measured in the raw data.
- ▌ Chromatographic Peak Detection And Segmentation · holobiomicslabUse when you have raw LC-MS data (mzML or vendor format) and need to discover and characterize all chromatographic features present, without prior knowledge of target analytes.
- ▌ Marker Feature Identification Chromatography Ms · holobiomicslabUse when when processing raw chromatography–mass spectrometry data (GC–MS or LC–MS) as a 2D m/z vs retention time map and you need to identify and visualize marker features for analyte discrimination without relying on conventional peak picking.
- ▌ Mass Spectral Missing Word Fraction Computation · holobiomicslabUse when when applying a pre-trained Spec2Vec Word2Vec model to new mass spectra (particularly those outside the model's training distribution), you need to assess whether peaks and neutral losses in query spectra have been seen during model training.
- ▌ Mass Spectral Similarity Scoring Across Samples · holobiomicslabUse when after XCMS feature detection, grouping, and retention time correction when you have aligned features with consistent retention times and intensity patterns across samples.
- ▌ Metabolite Feature Clustering By Retention Time · holobiomicslabUse when after XCMS feature detection, grouping, retention time correction, regrouping, and missing value filling on LC-MS or GC-MS data, when you have an aligned feature table with retention times and intensity profiles across multiple samples and need to collapse redundant features into.
- ▌ Performance Metric Extraction From Publications · holobiomicslabUse when you have identified a claim that one tool outperforms another (e.g., 'IDSL.IPA outperforms MZmine 2 and xcms') in a research article's abstract or introduction, but the specific metrics and results table are not included in the introductory text.
- ▌ Bag Of Words Document Representation Generation · holobiomicslabUse when you have raw MS/MS spectral data in standard mass spectrometry formats and need to prepare it for unsupervised substructure discovery via topic modeling.
- ▌ Biochemical Relation Integration For Annotation · holobiomicslabUse when when you have LC/MS feature data (m/z, retention time, intensity) that must be annotated against a metabolic database and you have access to (or can construct) knowledge about biochemical reaction networks, expected isotope patterns, and instrument-specific adduct formation rules.
- ▌ Bioconductor Summarized Experiment Construction · holobiomicslabUse when after successfully reading and validating a tab-delimited metabolomics file (containing mandatory columns: aliquot, compound, area, type, injection_time, batch) using readData, and before applying batch correction, outlier detection, or other QC filters.
- ▌ Blank Sample Background Interference Estimation · holobiomicslabUse when after MS1 feature detection and accurate mass annotation, when you have identified a set of blank injections (negative controls) run in the same analytical sequence segment as your biological or study samples.
- ▌ Checkpoint Selection Based On Validation Metric · holobiomicslabUse when training neural networks on MS/MS spectra (or similar scientific data) where you need to preserve model states that improve validation performance.
- ▌ Chemical Structure Transformation Documentation · holobiomicslabUse when when you have access to source code or algorithmic documentation of a metabolite generation pipeline (such as MAGMa's job subproject) and need to understand, validate, or reconstruct the transformations that convert a parent compound into enumerated metabolite candidates.
- ▌ Collision Cross Section Matching And Annotation · holobiomicslabUse when when you have LC-IM-MS/MS data with measured collision cross section (CCS) values and m/z assignments, and you need to disambiguate sterol isomers (particularly N-Me derived unsaturated sterols) by matching against a curated database of predicted CCS values and MS/MS fragmentation patterns.
- ▌ Collision Energy Optimization For Fragmentation · holobiomicslabUse when when you have N-Me derivatized unsaturated sterol lipid structures (as SMILES or molecular formula) and need to predict MS/MS fragmentation patterns with collision-energy-dependent m/z values and intensities for downstream CCS prediction or LC-IM-MS/MS library matching.
- ▌ Concentration Prediction From Calibration Model · holobiomicslabUse when you have (1) a set of calibration samples with known spiked concentrations of target compounds, (2) measured compound/internal-standard ratios for both calibration and study samples, and (3) need to convert ratios to absolute concentrations for reporting.
- ▌ Dynamic Exclusion Weighting Strategy Evaluation · holobiomicslabUse when you have prototyped a novel data-dependent acquisition strategy that uses dynamic exclusion with intensity or ROI weighting, and you need to quantitatively compare its MS/MS coverage and intensity performance against a simpler baseline (TopN) before testing on real instrumentation.
- ▌ Internal Standard Peak Detection And Validation · holobiomicslabUse when you have loaded processed LC-MS data (mzML or vendor format) and need to establish baseline instrument performance before evaluating sample analytes. Use it at the start of each LC-MS batch or run to ensure that internal standard detection passes predefined thresholds;
- ▌ Ionization Mode Specific Preprocessing Handling · holobiomicslabUse when you have raw MS/MS spectra in supported formats (.mgf, .mzML, or .msp) from mixed ionization modes and need to prepare them for downstream topic modeling (LDA) or motif discovery.