The binding of ammonia to the sensor domain of DhkC leads to the activation of its histidine kinase activity and to the autophosphorylation of a DhkC histidine residue.

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#Id: 453

#Unit 2. Cellular Organization

Acetylation, methylation, ubiquitylation, and sumoylation all occur on the free epsilon amino group of lysine.

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#Id: 1242

#Unit 7. System Physiology – Animal

GnRH stimulates secretion of FSH and LH by gonadotropes

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#Id: 107

#Unit 5. Developmental Biology

A cell is determined to a given fate if it maintains its developmental maturation toward this cell type even when placed in a new environment (commitment is irreversible).

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#Id: 7029

#Unit 11. Evolution and Behavior

Carolus Linnaeus - Classified “related” species into genera, “related” genera into orders, and so on. 

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#Id: 8029

#Unit 1. Molecules and their Interaction Relevant to Biology