Cyclin B

Cyclin B is a member of the cyclin family.

Cyclin B is a mitotic cyclin. The amount of cyclin B (which binds to Cdk1) and the activity of the cyclin B-Cdk complex rise through the cell cycle until mitosis, where they fall abruptly due to degradation. The complex of Cdk and cyclin B is called maturation promoting factor or Mitosis promoting factor (MPF).