973" Project (Grant No. G199905992), National Natural Science Foundation of China (Grant No. 39870364) and Natural Science Foundation of Zhejiang Province (Grant No. 398028).
To investigate whether GABA/progesterone (P4) stimulates PPI breakdown and its role in the acrosome reaction (AR), spermatozoa of guinea pig were preincubated in MCM-LCa2+ for 5.5 h and then labeled with [32P]pi for 1...