SPAG11B GI:126131097 sperm associated antigen 11B isoform D preproprotein 1 mrqrllpsvt slllvallfp gssqarhvnh satealgelr erapgqgtng 50 51 fqllrhavkr dllpprtppy qgdvppgirn tichmqqgic rlffchsgek 100 101 krdicsdpwn rccvsntdee gkekpemdgr sgi