[名词解释] maturation promoting factor，MPF (成熟促进因子)

Cdc34 protein（Cdc34 蛋白） cyclin-dependent protein kinases, Cdks (周期蛋白依赖性蛋白激酶) anaphase-promoting complex,APC (后期促进复合物) conditional mutants (条件突变体) cell cycles (细胞周期) maturation promoting factor，MPF (成熟促进因子)