[Answer] Proteins that are involved in the regulation of the cell cycle and that show fluctuations in concentration during the cell cycle are called _______

Answer: cyclins
Proteins that are involved in the regulation of the cell cycle and that show fluctuations in concentration during the cell cycle are called _______
Sun Apr 25 2004 14:30:00 GMT-0400 (Eastern Daylight Time) · Cyclins were originally named because their concentration varies in a cyclical fashion during the cell cycle . (Note that the cyclins are now classified according to their conserved cyclin box structure and not all these cyclins alter in level through the cell cycle .) The oscillations of the cyclins namely fluctuations in cyclin gene expression and destruction by the ubiquitin mediated …
Cyclin D is a member of the cyclin protein family that is involved in regulating cell cycle progression. The synthesis of cyclin D is initiated during G1 and drives the G1/S phase transition.Cyclin D protein is anywhere from 155 (in zebra mussel) to 477 (in Drosophila) amino acids in length.. Once cells reach a critical cell size (and if no mating partner is present in yeast) and if growth …
The cell cycle is driven by proteins called cyclin dependent kinases that associate with cyclin regulatory proteins at different checkpoints of the cell cycle . Different phases of the cell cycle experience activation and/or deactivation of specific cyclin-CDK complexes. CyclinB-CDK1 activity is specific to the G2/M checkpoint.
Cyclin – Wikipedia
Cyclin-dependent kinase – Wikipedia
Cyclin – Wikipedia
Cyclin-dependent kinase – Wikipedia
On the other hand a protein may interact briefly and in a reversible manner with other proteins in only certain cellular contexts – cell type cell cycle stage external factors presence of other binding proteins etc. – as it happens with most of the proteins involved in biochemical cascades. These are called transient interactions.
A cyclin-dependent kinase complex (CDKC cyclin-CDK) is a protein complex formed by the association of an inactive catalytic subunit of a protein kinase cyclin-dependent kinase (CDK) with a regulatory subunit cyclin. Once cyclin-dependent kinases bind to cyclin the for…

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