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

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#Id: 9360

#Unit 4. Cell Communication and Cell Signaling

Smad2/3 become phosphorylated by active RI receptors and together with Smad4 move into the nucleus to activate gene transcription

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#Id: 10120

#Unit 6. System Physiology – Plant

In maize kernels, IAA also appears to be synthesized by a tryptophan independent pathway via indole-3- glycerol phosphate

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#Id: 10250

#Unit 6. System Physiology – Plant

vp12 mutant have low chlorophyll content and reduced capacity for synthesis of carotenoids and ABA

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#Id: 7454

#Unit 5. Developmental Biology

In D. discoideum cAMP phosphodiesterase RegA plays a crucial role in regulating intracellular cAMP levels cells & level of PKA activity.

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#Id: 4692

#Unit 11. Evolution and Behavior

Reciprocity

When one individual provides a fitness benefit to another, as long as the second individual is likely to return the favor later.