Clockwise rotation gives dihedral angles from 0º to 180º.

180º is the same as counter-clockwise rotation to -180º.

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#Id: 8641

#Unit 2. Cellular Organization

Rb binds the activation domains of a E2F transcription factors, in the cytoplasm to prevent them from turning on the genes required for cell cycle progression.

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#Id: 6592

#Unit 7. System Physiology – Animal

Testosterone, is a  C19 steroid with a hydroxyl group in the 17 position

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#Id: 7680

#Unit 1. Molecules and their Interaction Relevant to Biology

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#Id: 4950

#Unit 6. System Physiology – Plant

PHYA is the only gene that encodes a Type I phytochrome. Phytochrome A predominantly perceives far-red light.

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#Id: 2407

#Unit 3. Fundamental Processes

In the Pyrophosphorolytic editing, the enzyme uses its active site, in a simple back-reaction, to catalyze the removal of an incorrectly inserted ribonucleotide, by reincorporation of PPi.