>sp|Q9Y4P9-2|SPEF1_HUMAN Isoform 2 of Sperm flagellar protein 1 OS=Homo sapiens OX=9606 GN=SPEF1 MASSVDEEALHQLYLWVDNIPLSRPKRNLSRDFSDGVLVAEVIKFYFPKMVEMHNYVPAN SLQQKLSNWGHLNRKVLKRLNFSVPDDVMRKIAQCAPGVVELVLIPLRQRLEERQRRRKQ GAGSLQELAPQDGSGYMDVGKVAFSISPSRLELSFCPSSCHL