The tubulin subunit is a heterodimer formed from two closely related globular proteins called a-tubulin and b-tubulin.

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#Unit 3. Fundamental Processes

The initiation of prokaryotic translation commences with the small subunit and is catalyzed by three translation initiation factors called IF1, IF2, and IF3.

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#Unit 7. System Physiology – Animal

Phase 2 (plateau), calcium channels open and fast potassium channels close

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#Unit 5. Developmental Biology

The top of the mound continues to emit cAMP pulses and is pushed upwards by the movement of cells underneath

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#Unit 10. Ecological Principles

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#Unit 6. System Physiology – Plant

Protonation of a membrane protein (PSBS) that promotes a dissipative state of LHC proteins in the PSII antenna is also a major form of NPQ