HolobiomicsLab
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- ▌ Lc Ms Data Pipeline Architecture · holobiomicslabUse when you have vendor-format LC-MS acquisition files (.raw, .d, .ms) from instrument runs and need to set up an end-to-end data quality control system that converts proprietary formats into open mzML, processes spectral data, and surfaces QC failures in real time.
- ▌ Lc Ms Feature Quality Assessment · holobiomicslabUse when you have generated feature tables from LC-MS data using different parameter combinations (e.g., varying Centwave, FeatureFinderMetabo, or ADAP peak picking settings) and need to objectively compare their outputs to select the -performing configuration for your dataset.
- ▌ Lc Ms Quality Metric Computation · holobiomicslabUse when after performing peak detection on centroided .mzML LC-MS data with screening_mode=FALSE in TARDIS.
- ▌ Lcms Feature Probability Scoring · holobiomicslabUse when you have an untargeted LC/MS feature table (m/z, retention time, intensity columns) and need to move beyond single-hit matching to probabilistic annotation.
- ▌ Lcms Feature Relationship Export · holobiomicslabUse when after ISFrag has completed identification of in-source fragment features (Part 4 output), when you need to serialize and inspect the hierarchical fragmentation relationships among identified ISF features, or when preparing data for visualization or external analysis of fragment lineage and.
- ▌ Lcms Target Visibility Screening · holobiomicslabUse when after loading centroided .mzML LC–MS runs and before executing full peak detection and integration.
- ▌ Lipid Library Annotation From Mz · holobiomicslabUse when you have experimental peaklist data (CSV or mzML-derived tables) from UHPLC-HRMS/MS instruments (Q-Exactive, Agilent/Bruker/SCIEX Q-TOF) with fragment m/z values and want to annotate them to known lipid identities.
- ▌ Machine Learning Model Inference · holobiomicslabUse when you have molecular descriptors or fingerprints for a set of compounds (e.g., from LC-MS metabolomics) and need to predict a continuous property—such as HPLC retention time—to support compound identification or filter out false positive annotations.
- ▌ Mahalanobis Distance Calculation · holobiomicslabUse when after data normalization (Box-Cox transformation) and before hypothesis testing in Step 9 of untargeted metabolomic workflows.
- ▌ Mass Difference Pattern Matching · holobiomicslabUse when after peak picking and sample alignment when you have an aligned feature table containing m/z and retention time coordinates. Use it when your untargeted LC-MS workflow needs to reduce feature redundancy caused by naturally occurring stable isotope patterns and common adduct formation.
- ▌ Mass Spectral Feature Annotation · holobiomicslabUse when you have m/z values from spatially-resolved mass spectrometry imaging (e.g., MALDI-MSI, DESI-MSI) and need to assign molecular formulae to thousands of features with higher precision than traditional LC-MS approaches.
- ▌ Mass Spectral Network Annotation · holobiomicslabUse when you have a GNPS molecular network (classical or feature-based) and MS2LDA LDA experiment output (Mass2Motif assignments with probability and overlap scores) from the same experiment, and you want to annotate network nodes with structural motifs and chemical classes to infer molecular.
- ▌ Mass Spectrum Similarity Scoring · holobiomicslabUse when when you have a query MS/MS spectrum (m/z and intensity pairs) that you need to match against a library of reference spectra, and you want to identify the -matching library entry while accounting for unmatched peaks that may indicate spectral contamination or chimerism.
- ▌ Mass Tolerance Optimization Hrms · holobiomicslabUse when you have experimental peak lists (m/z, retention time, intensity) from peak-picking software (MZmine, XCMS, MS-DIAL, or Compound Discoverer) and need to match them against a simulated lipid fragment library (500,000+ lipid species).
- ▌ Mass Track Consensus Computation · holobiomicslabUse when after mass tracks have been aligned across all samples (either via pairwise alignment for ≤10 samples or nearest-neighbor clustering for larger cohorts), and you need to generate a single representative m/z per aligned bin for downstream feature extraction and annotation.
- ▌ Metabolite Database Construction · holobiomicslabUse when when performing untargeted metabolomics annotation at scale and you need to estimate false discovery rates for candidate metabolite identifications.
- ▌ Metabolite Feature Normalization · holobiomicslabUse when you have loaded two or more nontargeted LCMS feature tables from the same analytical method that contain m/z, retention time, and intensity values, and these datasets exhibit differences in metadata scale, distribution, or format that could confound cross-dataset feature matching or.
- ▌ Metabolite Identifier Conversion · holobiomicslabUse when your metabolomics dataset contains metabolite identifiers in multiple formats (e.
- ▌ Metabolomics Classifier Training · holobiomicslabUse when you have a preprocessed metabolomics feature matrix (expression matrix with metabolite abundances as columns and samples as rows) with corresponding binary or multi-class sample labels, and you need to train and compare classifier performance to select the -performing model for disease.
- ▌ Molecular Fingerprint Generation · holobiomicslabUse when when you have annotated chemical structures (SMILES or InChI strings) from a curated MS/MS dataset and need to compute pairwise structural similarity scores (Tanimoto or other metrics) as training labels, or when preparing molecular representations for comparison against mass spectral data.
- ▌ Molecular Fingerprint Prediction · holobiomicslabUse when you have tandem MS/MS spectra paired with known molecular structures (for training) or unknown spectra requiring structure identification, and you want to predict dense molecular fingerprint vectors that encode structural similarity.
- ▌ Ms Peak Blank Signal Subtraction · holobiomicslabUse when you have an MS-DIAL feature table from DDA or DIA LC-MS analysis that includes blank injection samples (at least 3 recommended), and you need to eliminate features that are artifactual contamination rather than genuine metabolites.
- ▌ Ms Spectra Dataset Preprocessing · holobiomicslabUse when when you have a raw or partially processed MS/MS spectra collection (e.g., GNPS-sourced Orbitrap or Q-TOF spectra in MGF format) and need to (1) restrict to a specific instrument type (e.
- ▌ Ms2 Diagnostic Fragment Matching · holobiomicslabUse when you have centroided MS2 spectra from data-dependent LC- or GC-HRMS measurements and need to rapidly prioritize potential PFAS features within a larger feature set.
- ▌ Ms2 Fragment Pattern Recognition · holobiomicslabUse when you have data-dependent acquisition (DDA) MS2 spectra from HRMS measurements (ESI or APCI ionization) and need to prioritize potential PFAS features from a large pool of detected ions.
- ▌ Msms Spectral Database Retrieval · holobiomicslabUse when when you have a target compound (modified or unmodified) and need to obtain its experimental MS/MS spectrum and metadata to serve as a known reference for ModiFinder analysis, or when benchmarking evaluation methods like average_distance scoring.
- ▌ Multiclass Metabolite Comparison · holobiomicslabUse when when you have a normalized metabolite abundance matrix with sample metadata assigning each sample to one of three or more distinct biological classes (e.
- ▌ Network Diffusion Prioritization · holobiomicslabUse when after clustering and filtering KEGG candidates for LC-MS features, when you have a ranked set of candidate metabolites per feature and access to a metabolite interaction network (e.g., from FELLA).
- ▌ Neural Network Input Preparation · holobiomicslabUse when when you have annotated representative LCMS samples (raw mzML files + labeled feature tables in mzmine CSV format) and need to convert them into balanced or unbalanced peak matrix batches with fixed dimensions for neural network training.
- ▌ Neutral Loss Formula Computation · holobiomicslabUse when you have tandem mass spectra with precursor m/z and observed fragment peak m/z values (as mz/intensity pairs), and you need to construct interpretable feature vectors where each axis corresponds to a real chemical entity (peak or neutral loss) rather than a latent dimension.
- ▌ Neutral Loss Peak Interpretation · holobiomicslabUse when you have a tandem mass spectrum (MSMS) loaded via USI and wish to maximize the interpretability of observed peaks.
- ▌ Numerical Method Scheme Analysis · holobiomicslabUse when when correcting LC-MS isotope labeling data and existing numerical schemes (e.
- ▌ Peak Deconvolution Preprocessing · holobiomicslabUse when you have raw IM-MS data in Agilent MassHunter (.d) or UIMF format from drift tube (DT) or SLIM instruments, and you intend to perform HRdm demultiplexing or peak deconvolution to resolve co-eluting or structurally similar ions.
- ▌ Peak Detection Mass Spectrometry · holobiomicslabUse when you have raw mass-spectrometry data files (mzML, mzXML, or vendor formats) from untargeted metabolomics experiments and need to extract differential metabolic ion peaks for downstream statistical or annotation analysis.
- ▌ Peak Detection Optimization Free · holobiomicslabUse when when processing raw untargeted LC/MS data in mzML or mzXML format and you need to detect peaks across mass-to-charge (m/z) and retention time (rt) dimensions without prior knowledge of optimal signal detection parameters, QC samples, or domain expertise in LC/MS preprocessing.
- ▌ Peak Detection Signal Processing · holobiomicslabUse when after feature extraction from mzML/mzXML breath analysis data when you have a numerical array or dataframe of feature intensities across retention time or m/z dimensions and need to identify which features represent genuine volatile organic compound (VOC) signals rather than noise or.
- ▌ Peak List Filtering And Cleaning · holobiomicslabUse when you have acquired MS/MS spectra containing suspect noise ions—either electronic noise (ions with identical intensities occurring >4 times in a single peak list, a signature of detector artifacts) or chemical noise (fragment ions chemically implausible given the precursor molecule's.
- ▌ Peak List Parsing And Validation · holobiomicslabUse when when importing raw mass spectrometry data from vendor or open formats (mzML, mzXML, msp, MGF, JSON, metabolomics-USI) and you need to extract peak m/z and intensity pairs into a standardized representation.
- ▌ Peak Matching And Mass Alignment · holobiomicslabUse when when you have raw MS2 spectra (m/z and intensity pairs) and a curated reference peak list from a large training dataset (e.
- ▌ Peak Picking Algorithm Selection · holobiomicslabUse when at the entry point of SLAW processing when you have centroided mzML or netCDF LC-MS files and need to decide which peak-picking algorithm to use. Trigger this skill when: (1) raw LC-MS data must be converted into a feature matrix;
- ▌ Peptide Mass Calculation Average · holobiomicslabUse when you have a list of polypeptide sequences (one per line or CSV format) and need to compute average mass (weighted by natural isotope abundances) to compare against experimental LC-MS or MS/MS data where the full isotopic distribution—not just the most abundant peak—is relevant for peptide.
- ▌ Pfas Homologous Series Detection · holobiomicslabUse when you have an m/z-resolved feature list from LC- or GC-HRMS analysis (either detected by pyOpenMS or provided as a custom Excel table) and need to prioritize potential PFAS compounds by identifying clusters of homologous structures.
- ▌ Proforma 2 0 Peptidoform Parsing · holobiomicslabUse when you have a ProForma 2.0 peptidoform string (e.
- ▌ Publication Figure Customization · holobiomicslabUse when after annotating a mass spectrometry spectrum with fragment ions (e.g., via ProForma 2.
- ▌ Qc Sample Reliability Evaluation · holobiomicslabUse when after drift correction has been applied to your LC-MS peak table and you need to identify low-quality metabolic features that exhibit high internal spread (RSD, RSD*) or excessive QC-versus-biological variation (D-ratio) before imputation and batch correction.
- ▌ Qr Code Generation And Embedding · holobiomicslabUse when you need to publish metabolomics spectra in static media (PDF, print, supplementary tables) and want readers or automated systems to access the corresponding interactive spectrum visualization without manual lookup.
- ▌ Quasi Molecular Adduct Filtering · holobiomicslabUse when after feature clustering has been applied to co-eluting LC-MS features and mass-to-charge ratio matching to KEGG has produced an annotated table with adduct assignments.
- ▌ R6 Class Object Mutation Testing · holobiomicslabUse when when applying a series of mpactr filter functions (filter_mispicked_ions, filter_group, filter_cv, filter_insource_ions) with copy_object=FALSE to confirm that the original peak table object is mutated as intended, not silently copied.
- ▌ Ranked Annotation Prioritization · holobiomicslabUse when you have completed cluster-based filtering of KEGG candidate assignments in untargeted LC-MS metabolomics and need to rank those candidates by biological plausibility using a metabolite interaction network. Specifically, use it after `clusterBased.
- ▌ Raw File Data Extraction Via API · holobiomicslabUse when you have a Thermo Fisher Scientific .raw file (e.g., Q Exactive HF, Orbitrap) and need to extract specific spectral scans, chromatographic traces, scan-level metadata, or file-level headers programmatically—e.
- ▌ Reference Semantics Verification · holobiomicslabUse when when applying sequential filters to a large metabolomics peak table (e.g., mispicked ions, group, CV, or in-source filters) and you need to confirm that setting copy_object=FALSE actually modifies the input object in-place rather than creating a hidden copy.
- ▌ Relative Abundance Preprocessing · holobiomicslabUse when when you have raw count tables from 16S rRNA sequencing (microbiome) or LC-MS/MS metabolomics (metabolome) and need to train neural network or regression models for microbe-metabolite relationship prediction.
- ▌ Replicate Spectrum Concatenation · holobiomicslabUse when after extracting raw MS/MS spectra from mzML files for individual features (identified by precursor m/z and retention time) and you have multiple replicate spectra for the same feature that need to be pooled for consensus analysis.
- ▌ Retention Time Alignment Scoring · holobiomicslabUse when after feature m/z grouping and pairwise alignment detection have identified candidate feature pairs, and anchor points have been selected to establish retention time correspondence.
- ▌ Retention Time Index Calibration · holobiomicslabUse when you have acquired a bottom-up proteomics LC-MS/MS run (e.
- ▌ Retention Time Window Clustering · holobiomicslabUse when after filtering LC-MS features by statistical significance (e.g., p-value < 0.01) and you need to link individual m/z features into structural clusters representing the same metabolite in different ionization states or isotopic forms.
- ▌ Retention Time Window Extraction · holobiomicslabUse when you have loaded sqMass files containing pre-extracted transition group chromatograms and need to isolate chromatographic traces within a specific retention time interval—either defined by OpenSwath feature metadata (apex retention time ± margin) or by manual user selection.
- ▌ Runtime Performance Benchmarking · holobiomicslabUse when when you have implemented or adopted a new clustering or analysis tool and need to validate that it meets stated runtime claims on a representative production-scale dataset. Particularly important when the tool uses hardware acceleration (GPU) and the claimed speedup is a core contribution;
- ▌ Scan Index Filtering By Ms Level · holobiomicslabUse when when you have generated a scan index from rawrr::readIndex() on a Thermo .
- ▌ Scan Index Parsing And Filtering · holobiomicslabUse when you have a Thermo Orbitrap .raw file and need to (1) verify that a targeted acquisition method (e.g., PRM) maintains consistent scan spacing across all cycles; (2) extract only scans matching a specific precursor ion and fragmentation method;
- ▌ Score Distribution Visualization · holobiomicslabUse when after computing link scores (e.g., strain correlation, IOKR, or combined scores) across GCF-MF pairs, use this skill to assess whether scores achieve sufficient separation between validated links and the background population.
- ▌ Signal Apodization Configuration · holobiomicslabUse when when processing raw Bruker Solarix transient files (.d format) destined for FT-MS analysis, especially for ESI-negative or low-abundance natural organic matter samples where baseline noise and side-lobe artifacts around intense peaks degrade peak picking and formula assignment accuracy.
- ▌ Small Molecule Compound Indexing · holobiomicslabUse when when you have retention order predictions from multiple ensemble members (e.g., ROASMI_1 through ROASMI_5) for a set of candidate compounds and need to assign a per-compound uncertainty score that reflects how consistently the ensemble members rank that compound relative to others.
- ▌ Smoothing Spline Basis Selection · holobiomicslabUse when you have a set of anchor feature pairs (m/z and retention time values) from two disparately-acquired LC-MS datasets and need to fit a smooth, nonlinear RT correction spline.
- ▌ Spectral Data Import And Parsing · holobiomicslabUse when you have raw mass spectrometry data in one or more supported formats (mzML, mzXML, msp, metabolomics-USI, MGF, or JSON) and need to convert it into a standardized in-memory representation that can be processed, validated, and compared using matchms.
- ▌ Spectral Feature Standardization · holobiomicslabUse when after peak-picking stage completes on centroided mzML or netCDF raw LC-MS data via any of the three wrapped algorithms (Centwave, FeatureFinderMetabo, ADAP), when you need to pass the detected features to downstream SLAW stages (alignment, isotope/adduct grouping, gap-filling, MS2.
- ▌ Spectral Fragment Ion Annotation · holobiomicslabUse when you have an MS/MS spectrum (m/z and intensity arrays) and a known or hypothesized peptide sequence (optionally with post-translational modifications in ProForma 2.
- ▌ Spectral Intensity Normalisation · holobiomicslabUse when processing raw MS/MS spectra (in MGF, mzML, mzXML, JSON, or MSP format) prior to MS2Query library matching or MS2Deepscore embedding calculation.
- ▌ Spectral Intensity Normalization · holobiomicslabUse when after removing precursor and noise peaks from an MsmsSpectrum object when the spectrum contains peaks with highly variable intensities (e.g., one or two dominant peaks with many weaker fragments).
- ▌ Spectral Peak Embedding Encoding · holobiomicslabUse when when you have variable-length MS/MS peak lists (m/z and intensity arrays) that must be fed into a transformer-based model for spectra analysis, and you need deterministic, normalized embeddings that preserve peak frequency information across multiple scales.
- ▌ Spectrum Annotation Augmentation · holobiomicslabUse when you have a TCN-predicted training set of MS/MS spectra with formula annotations and need to prepare it for Siamese rescore model training.
- ▌ Synthetic Lcmsms Data Generation · holobiomicslabUse when you need to create defined LC-MS/MS datasets with known molecular composition and fragmentation patterns for algorithm validation, method development, or evaluation of analytical challenges (e.g., co-elution prediction).
- ▌ System Environment Configuration · holobiomicslabUse when you need to execute a complex computational chemistry workflow (QCxMS2) that depends on multiple external semiempirical and ab initio quantum chemistry packages.
- ▌ Transformation Method Comparison · holobiomicslabUse when when you have paired microbiome (16S rRNA or functional) and metabolome (LC-MS/MS or similar) data and must decide between compositional transformations (CLR, RA, or others) before training a predictive model.
- ▌ Unsupervised Spectrum Clustering · holobiomicslabUse when when you have high-dimensional embedding vectors from pretrained models (e.g., MSBERT) and need to verify that the learned representation space groups spectra by chemical similarity without labeled training data.
- ▌ Usi Spectrum Identifier Encoding · holobiomicslabUse when you have a Universal Spectrum Identifier (USI) string referencing a spectrum in a supported metabolomics repository (GNPS, MassBank, MetaboLights, Metabolomics Workbench, MassIVE, or MS2LDA) and need to create an embeddable, scannable reference for publication or data integration that.
- ▌ Web Application Endpoint Mapping · holobiomicslabUse when you have a user-submitted spectrum with associated domain context metadata (e.g., selected as 'microbial origin', 'plant tissue', 'food sample') and need to route that spectrum to the appropriate domain-specific MASST application for searching.
- ▌ Xcms Grouped Object Manipulation · holobiomicslabUse when you have preprocessed LC-MS data with detected chromatographic peaks that need to be consolidated into feature groups representing putative compounds.
- ▌ Xcms Output Replacement Workflow · holobiomicslabUse when xCMS has produced aligned LC-MS features but alignment quality is suspected to be poor—especially when analyzing hundreds of samples, data acquired over extended periods (>1 week), or when individual m/z bins show inconsistent RT shifts.
- ▌ Bioassay Activity Data Integration · holobiomicslabUse when when you have (1) a molecular network graph from GNPS with node identifiers and edges, (2) LC-MS/MS features quantified across fractions in a feature table, and (3) bioassay measurements (e.
- ▌ In Silico Fragment M Z Calculation · holobiomicslabUse when when you have experimental UHPLC-HRMS/MS or direct infusion MS/MS data and need to identify lipid species by comparing observed fragment m/z values against a library of simulated fragments. Apply this skill when your lipid library is incomplete or specialized (e.
- ▌ In Silico Fragmentation Prediction · holobiomicslabUse when you have candidate metabolite structures (from database lookup or enumeration) and experimental MS/MS spectra (mzML, mzXML format), and need to rank candidates by how well their predicted fragments match observed peaks.
- ▌ Inadequate Spectral Interpretation · holobiomicslabUse when you have clustered peak networks from INADEQUATE NMR spectra (output from the Clustering module) and need to assign metabolite identities by comparing them to known spectral signatures.
- ▌ Top K Retrieval Ranking Evaluation · holobiomicslabUse when when you have deployed a trained embedding or similarity model on a test set of tandem mass spectra and need to measure its ability to rank correct library compounds near the top of retrieved candidates.
- ▌ Transfer Learning Encoder Freezing · holobiomicslabUse when you have a pretrained spectrum encoder (e.g., TCN on mass spectrometry data) that has learned useful representations, and you need to train new components (e.g., a rescoring module) for a related but distinct task (e.
- ▌ Treemap Visualization Construction · holobiomicslabUse when after applying one or more mpactr filters (filter_mispicked_ions, filter_group, filter_cv, filter_insource_ions) to an mpactr object, use this skill when you need to communicate the count and percentage breakdown of ions retained vs. rejected across filter status categories.
- ▌ Untargeted Metabolomics Annotation · holobiomicslabUse when you have authentic metabolite standards analyzed by LC-MS in both positive and negative ESI modes (converted to .
- ▌ Usi Spectrum Retrieval And Loading · holobiomicslabUse when you have a USI accession (e.g., 'mzspec:MSV000082283:f07074:scan:5475' or 'mzspec:PXD000561:Adult_Frontalcortex_bRP_Elite_85_f09:scan:17555') pointing to a publicly deposited tandem mass spectrometry scan in a GNPS or ProteomeXchange repository, and you need to retrieve and instantiate.
- ▌ Vendor Raw File Format Recognition · holobiomicslabUse when you have a directory containing mass spectrometry data files from multiple instrument vendors (Thermo, AB Sciex, Agilent, Bruker, etc.) and need to convert them to a common format (Aird or mzML).
- ▌ 2d Nmr Pulse Sequence Implementation · holobiomicslabUse when when you need to generate 2D metabolomic NMR spectra (COSY for homonuclear or HSQC/HMQC for heteronuclear correlations) from parsed metabolite concentration and spin-system J-coupling data, and you want to simulate realistic peak patterns including indirect-dimension evolution and phase.
- ▌ Chemical Shift Coordinate Extraction · holobiomicslabUse when you have loaded an INADEQUATE NMR spectrum file and need to detect individual peaks (local maxima) across the chemical shift dimension with associated intensity values. This is the mandatory first processing step before filtering peaks into networks or matching against metabolite databases.
- ▌ Coefficient Of Variation Computation · holobiomicslabUse when you have loaded raw NMR or MS metabolomic abundance data into a SummarizedExperiment object and need to assess feature reproducibility before downstream association modeling.
- ▌ Container Image Build And Deployment · holobiomicslabUse when you have a Dockerfile and source repository for a bioinformatics tool (e.g., CloMet) and need to verify that the tool can be containerized, deployed, and made executable in an isolated environment.
- ▌ Cross Assay Feature Linkage Analysis · holobiomicslabUse when after identifying statistically significant features within individual LC-MS assays (e.g., via MB-VIP and permutation testing), use this skill when you have multiple parallel assays acquired in complementary ionization modes (e.
- ▌ Graph Based Molecular Representation · holobiomicslabUse when when you have 1D NMR spectra (¹H and/or ¹³C) as input and need to predict complete molecular structure (both molecular formula and bond connectivity) for molecules with up to 19 heavy atoms.
- ▌ Lineshape Convolution And Broadening · holobiomicslabUse when after generating theoretical spin multiplets for individual metabolites via first-order or density-matrix NMR simulation, but before combining spectra or applying Fourier transformation.
- ▌ Mass Difference Network Construction · holobiomicslabUse when you have a preprocessed peak list (m/z values and assigned molecular formulas) from direct injection FT-ICR MS of a complex organic mixture (e.
- ▌ Modality Contribution Quantification · holobiomicslabUse when when you have a trained multitask model that accepts multiple input modalities (e.g., 1D NMR spectra in different nuclei or complementary analytical techniques) and you need to understand their relative importance for the downstream prediction task (e.g., molecular structure elucidation).
- ▌ Nmr Chemical Shift Interval Matching · holobiomicslabUse when you have isolated one or more regions-of-interest (ROIs) from a proton NMR spectrum (defined as lower and upper chemical-shift bounds in ppm) and need to systematically generate a list of plausible metabolite assignments from a reference database.
- ▌ Nmr Metabolite Identity Confirmation · holobiomicslabUse when you have preprocessed 1H NMR spectral data with an unknown or ambiguous peak (e.g., at a specific chemical shift δ), and you need to determine its chemical identity.