# Cell Biology

> Explains cell structure, organelles, signaling pathways, and cell cycle regulation for biology study and research.

- Skill: `neuralblitz/cell-biology` (Agent Skill)
- Install (CLI): `npx skillmds add neuralblitz/cell-biology`
- Raw SKILL.md: https://api.skillmd.com/api/skills/neuralblitz/cell-biology/raw
- Safety review: PASS (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Research & Search, Literature Review
- Tags: Biology, Cell Biology, Cell Cycle, Cell Signaling, Organelles
- License: MIT
- Author: NeuralBlitz (https://skillmd.com/u/neuralblitz)
- Updated: 2026-08-22
- Page: https://skillmd.com/skills/neuralblitz/cell-biology

---


## What I do

- Study cell structure, organization, and function
- Investigate cell signaling and communication
- Analyze cell division and cycle regulation
- Research organelle function and dynamics
- Study cell death pathways (apoptosis, necrosis)
- Investigate stem cells and differentiation

## When to use me

- When studying cell morphology and organization
- When analyzing cell signaling pathways
- When investigating cell cycle regulation
- When researching cancer cell biology
- When studying cellular responses to stimuli
- When working with cell culture systems

## Key Concepts

### Cell Structure

**Major Organelles**
- Nucleus: DNA storage, transcription, replication
- Mitochondria: Energy production (ATP)
- Endoplasmic Reticulum: Protein folding (RER), lipid synthesis (SER)
- Golgi Apparatus: Protein modification and sorting
- Lysosomes: Cellular digestion
- Chloroplasts: Photosynthesis (plant cells)

### Cell Cycle Regulation

```python
# Example: Cell cycle phases
cell_cycle_phases = {
    'G1': 'Cell growth and preparation',
    'S': 'DNA replication',
    'G2': 'Growth and preparation for mitosis',
    'M': 'Mitotic division (prophase, metaphase, anaphase, telophase)'
}

# Key regulators
cyclins = ['Cyclin D', 'Cyclin E', 'Cyclin A', 'Cyclin B']
cdks = ['CDK4/6', 'CDK2', 'CDK2', 'CDK1']
```

### Signaling Pathways

- Receptor tyrosine kinases (RTK)
- G protein-coupled receptors (GPCR)
- Intracellular receptors (steroid hormones)
- Second messengers (cAMP, Ca²⁺, IP₃)
- MAPK/ERK pathway
- PI3K/Akt pathway
- JAK-STAT signaling