Activation of proacrosin by a locally produced component of human follicular fluid
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Summary. Components of human follicular fluid were separated on Sepharose 6B columns and the effects of different fractions on the conversion of pig proacrosin to acrosin were examined. A high-molecular-weight fraction (Mr > 3 000 000) of follicular fluid was a potent stimulator of this reaction. The proacrosin converting activity was absent in the corresponding fraction of blood serum. The acceleration of proacrosin activation was dependent on the concentration of material with proacrosin converting activity. The results indicate that human follicular fluid contains a high-molecular-weight component of local origin which is capable of accelerating proacrosin in a dose-dependent manner.
Keywords: proacrosin; acrosin; zymogen activation; follicular fluid
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