An evolutionarily conserved family of signaling molecules, TGF-β superfamily includes: 

TGF-β family, Nodal and activin families, BMPs, Vg1 family, GDNF, AMH

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#Unit 1. Molecules and their Interaction Relevant to Biology

Right-handed helical conformation has 3.6 residues per turn and 1.5A/aa.

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#Unit 8. Inheritance Biology

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#Unit 2. Cellular Organization

Histone tail modifications 

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#Unit 6. System Physiology – Plant

Amyloplasts that function as gravity sensors are called statoliths, and the specialized gravity-sensing cells in which they occur are called statocytes

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#Unit 6. System Physiology – Plant

When plants recognize elicitors from insect saliva, An increase in the cytosolic Ca2+ concentration ([Ca2+]cyt) is an early signal that mediates insect elicitor–induced responses.