Cyclin B

**Semantic type:** Amino Acid, Peptide, or Protein

**Definition:** A protein family whose members form complexes with cyclin-dependent kinase 1 to form maturation promoting factor (mitosis promoting factor; MPF), which is essential for the progression through the G2/M and DNA damage cell cycle checkpoints.

**Synonyms:** - CCNB - Cyclin-B - G2/Mitotic-Specific Cyclin-B