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- W2023689343 abstract "The pre-penetration binding interactions between gametes of the golden hamster were investigated in vitro. Binding between capacitated spermatozoa and the surface of eggs, that is the zonae pellucidae with intact vitelli, as a function of the concentration of spermatozoa, followed a sigmoidal curve. This was in sharp contrast to the linear binding obtained with mechanically isolated zonae pellucidae (zonae lacking vitelli). Penetration of eggs as a function of the concentration of spermatozoa paralleled the binding curve that occurred between gametes. The binding curve obtained with uncapacitated spermatozoa and eggs was not sigmoidal but was linear after a slight lag and parallel to the curve obtained with uncapacitated spermatozoa and isolated zonae pellucidae. Taken together these results support previous work which implicated a vitelline factor in the binding reaction between the surfaces of eggs and capacitated spermatozoa. By scoring binding at one minute intervals it was possible to relate the rapid uninterrupted binding that occurs between capacitated spermatozoa and isolated zonae pellucidae with the equally rapid but transient and vitellus-influenced binding that occurs between gametes. It was concluded that the vitelline factor acts by preventing most of the early type of binding that occurs between spermatozoa and isolated zonae pellucidae and not by terminating the early, rapid, initial binding as previously postulated. Thus, this early binding never occurs between most of the gametes that finally bind 30 to 40 minutes later and, therefore, does not play a role in the establishment of the late binding step which leads to penetration." @default.
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- W2023689343 title "Surface interactions between mammalian sperm and egg: Variation of spermatozoa concentration as a probe for the study of binding in vitro" @default.
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- W2023689343 doi "https://doi.org/10.1002/jcp.1040880211" @default.
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