In the absence of ATP, the myosin head is firmly attached to the actin filament. 

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#Id: 10469

#Unit 4. Cell Communication and Cell Signaling

Three mechanisms for LOH of tumor-suppressor genes:

Inactivating mutation or deletion

Chromosome missegregation

Mitotic recombination

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#Id: 4745

#Unit 5. Developmental Biology

PKC-3 restricts PAR-1 and PAR-2 to the internal cytoplasm by phosphorylating them.

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#Unit 5. Developmental Biology

Chemotactic compounds hormone Progesterone,  made by the cumulus cells, might trigger the release of Protein kinase A from the sperm cell membrane, & allowing it to activate the sperm-specific cation CatSper channels would facilitate the transfer of calcium ions into the sperm, where they would cause exocytosis of the acrosome

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#Id: 366

#Unit 1. Molecules and their Interaction Relevant to Biology

The enzyme that catalyzes this reversible reaction is called succinyl-CoA synthetase or succinic thiokinase

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#Unit 13. Methods in Biology

Tetrazolium compound MTT (3-(4,5-Dimethylthiazol- 2-yl)-2,5-diphenyltetrazolium bromide MTT Assay is calorimetric assay to detect cell division