cyclin

(redirected from Mitotic cyclin)
Also found in: Dictionary, Medical.
Related to Mitotic cyclin: M-cyclin

cyclin

[′sī·klin]
(cell and molecular biology)
Any member of a family of proteins that regulate the cell cycle and whose cellular levels rise steadily until mitosis, then fall abruptly to zero. As cyclins reach a threshold level, they are thought to drive cells into G2 phase and thus toward mitosis.