SPAG11B GI:126091042 sperm associated antigen 11B isoform G preproprotein 1 mrqrllpsvt slllvallfp gssqarhvnh satealgelr erapgqgtng 50 51 fqllrhavkr dllpprtppy qgdvppgirn tichmqqgic rlffchsgtg 100 101 qqhrqrcg