AcrosomeSperm HeadSpermatozoaAcrosome ReactionSperm CapacitationAcrosinSperm-Ovum InteractionsZona PellucidaFertilizationPeanut AgglutininCell MembraneMicroscopy, ElectronSperm CountEpididymisAntigens, CD46Sperm MotilitySpermatocidal AgentsHyaluronoglucosaminidaseMembranesExocytosisWheat Germ AgglutininsMembrane LipidsMicroscopy, ImmunoelectronIntracellular MembranesOvumTestisSperm MaturationMembrane PotentialsMembranes, ArtificialLectinsMembrane FusionCattleSperm MidpieceSemen PreservationGuinea PigsElectrophoresis, Polyacrylamide GelEchinodermataMembrane ProteinsSwineSperm TransportMembrane FluidityErythrocyte MembraneCell Membrane PermeabilityInfertility, MaleSperm Injections, IntracytoplasmicSemenBasement MembraneSpermatidsMembrane GlycoproteinsHorseshoe Crabsrab3A GTP-Binding ProteinEgg ProteinsSemen AnalysisCryopreservationCalciumEjaculationSperm BanksCalcimycinMembrane Transport ProteinsSeminal Plasma ProteinsFertilitySea CucumbersSpermatogenesisMolecular Sequence DataVitelline MembraneProtein TransportAnnelidaAmino Acid SequenceLipid BilayersModels, BiologicalMicroscopy, FluorescenceProtein BindingHydrogen-Ion ConcentrationMitochondrial MembranesFluorescent Antibody TechniqueIonophoresSperm TailFreeze FracturingCarrier ProteinsMolecular WeightCell FractionationVitelline DuctOocytesSeminal Vesicle Secretory ProteinsSynaptic MembranesBlotting, WesternFluorescent DyesProtein Structure, TertiarySea UrchinsDetergentsOctoxynolCricetinaeReceptors, Cell SurfaceLiposomesCell LineActinsCells, CulturedSperm AgglutinationTime FactorsCytoplasm