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🧬 From Signal → Gene Expression!

The JAK–STAT pathway is one of the fastest communication systems inside our cells. A signal outside the cell can directly activate genes inside the nucleus within minutes.

Here’s how it works:
⚡ Ligand binds receptor
⚡ Receptor dimerizes
⚡ JAK proteins activate each other
⚡ STAT proteins get phosphorylated
⚡ STAT dimers move into the nucleus
⚡ Genes switch ON

This pathway controls essential biological functions like:

🩸 Red blood cell production
🛡 Immune responses
🥛 Milk production
📈 Cell growth

Small molecular signals, massive biological impact!

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