Any of several related proteins whose concentrations rise and fall during the course of the eukaryotic cell cycle. Cyclins form complexes with cyclin-dependent kinases, thereby activating and determining the substrate specificity of these enzymes.
Protein that periodically rises and falls in concentration in step with the eucaryotic cell cycle. Cyclins activate crucial protein kinases (called cyclin-dependent protein kinases) and thereby help control progression from one stage of the cell cycle to the next.
A regulatory protein whose abundance varies during the cell cycle and which regulates biochemical events in a cell cycle-specific manner.
SI-klin A type of protein that controls the cell cycle. 177
A family of labile proteins that are synthesized and degraded at specific times within each cell cycle and that regulate cell cycle progression through their interactions with specific cyclin-dependent protein kinases.
protein found in the dividing cells of many organisms that acts as a control during cell division.
Cyclins are a family of proteins involved in the progression of cells through the cell cycle. A cyclin forms a complex with its partner cyclin-dependent kinase (Cdk), which activates the latter's protein kinase function. Cyclins are so named because their concentration varies in a cyclical fashion during the cell cycle; they are produced or degraded as needed in order to drive the cell through the different stages of the cell cycle.