Sperm-activatingpeptide b (Echinometra mathaei type B egg jelly coat), 5-glycine-7-glycine-8-glycine-;L-Aspartic acid,N-[N-[N2-[N-[N-[N2-[N-[N2-(N-glycyl-L-tyrosyl)-L-asparaginyl]-L-leucyl]glycyl]glycyl]glycyl]glycyl]-L-isoleucyl]-
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