CCNB

CCNB1 is a regulatory protein involved in mitosis. CCNB1 complexes with p34(cdc2) to form the maturation-promoting factor (MPF).The protein encoded by this gene is a regulatory protein involved in mitosis. The gene product complexes with p34(cdc2) to form the maturation-promoting factor (MPF). Two alternative transcripts have been found, a constitutively expressed transcript and a cell cycle-regulated transcript, that is expressed predominantly during G2/M phase. The different transcripts result from the use of alternate transcription initiation sites.