“Consistent with … of the p32 was inhibited by extracellular calcium chelators (ethylene …)-N,N,N',N',-tetraacetic acid [EGTA], EDTA , and 1,2-bis-(2-aminophenoxy)ethane-N,N,N',N'-tetraacetic acid potassium salt [… the importance of calcium in protein tyrosine phosphorylation related to capacitation in boar sperm.”