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- W1570782785 abstract "We previously identified 62, 39, 27 and 7 kDa porcine sperm plasma membrane proteins that demonstrated a predominant affinity for the porcine oocyte plasma membrane by Western ligand blotting. The current experiments were designed to further investigate the potential roles of these molecules in sperm-oocyte plasma membrane interaction. Abilities of these proteins to bind to the oocyte plasma membrane and to inhibit sperm-oocyte interaction were evaluated. Plasma membrane was isolated primarily from the head of ejaculated porcine sperm by nitrogen cavitation and density gradient centrifugation. Fractions containing the 62, 39, 27 and 7 kDa proteins were electroeluted from one dimensional SDS polyacrylamide gels, dialysed and proteins biotinylated. Following incubation with zona-free porcine oocytes, bound protein was visualized with 20 μg TRITC-avidin/ml using confocal microscopy. Fractions of the dialysed, electroeluted proteins were added to porcine in vitro fertilization assays. The 62, 39, 27 and 7 kDa proteins all demonstrated binding to the oocyte plasma membrane in contrast to a biotinylated control protein. Addition of unlabelled sperm plasma membrane proteins to the biotinylated protein visibly reduced binding. Addition of each of these protein fractions to in vitro fertilization assays reduced sperm interaction with the porcine oocyte plasma membrane in a concentration-dependent manner. Binding of these sperm plasma membrane proteins to the oocyte plasma membrane and inhibition of fertilization are consistent with these proteins being involved in sperm-oocyte plasma membrane interaction." @default.
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- W1570782785 date "2011-01-18" @default.
- W1570782785 modified "2023-09-25" @default.
- W1570782785 title "Interaction of Potential Porcine Sperm Ligands with the Oocyte Plasma Membrane" @default.
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- W1570782785 doi "https://doi.org/10.1111/j.1439-0531.2009.01522.x" @default.
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