SPACA4 GI:19424138 sperm acrosomal membrane protein 14 1 mvlcwllllv malppgttgv kdcvfceltd smqcpgtymh cgddedcftg 50 51 hgvapgtgpv inkgclrats cgleepvsyr gvtyslttnc ctgrlcnrap 100 101 ssqtvgatts lalglgmllp prll