Cyclin

Tertiary structure of human cyclin A (lacking the amino-terminal 170 amino acids), showing the central core of two five-helix bundles, with additional helices at the amino terminus (black) and carboxyl terminus (grey). The yellow region in helix 1 is the MRAIL sequence or hydrophobic patch, which contributes to the recognition of some substrates. (PDB 1fin)

Cyclins are proteins that control the progression of a cell through the cell cycle by activating cyclin-dependent kinases (CDK).[1]

  1. ^ Galderisi U, Jori FP, Giordano A (August 2003). "Cell cycle regulation and neural differentiation". Oncogene. 22 (33): 5208–19. doi:10.1038/sj.onc.1206558. PMID 12910258. S2CID 19528945.