cell division control protein 2-A p34cdc2 p34 protein kinase 1 cell division cycle 2 like cdc2-a cdk1-b cdc28a Cell division control protein 2 homolog 1 maturation-promoting factor cyclin-dependent kinase 1-A cdc-2 cdc2 cdk1-a MPF cdc2x1.1 PSTAIR cell division protein kinase 1-A xcdc2