
Compilation of free information about human parts, their function, assembly, repair, and maintenance
| Cell signaling |
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| Key concepts - Ligand | Receptor | Second messenger | Protein kinase | Transcription factor | Cell signaling networks |
| Pathways - Apoptosis | Ca2+ signaling | Cytokine signaling | Hedgehog | Integrin signaling | JAK/STAT | Lipid signaling | MAPK/ERK pathway | mTOR | NF-kB | Notch | p53 | TGFβ | Wnt |