SNX21 GI:111118959 sorting nexin 21 isoform c 1 mhrgtqegam asrllhrlrh alagdgpgea aaspeaeqfp esseleddda 50 51 eglssrlsgt lsftsaedde ddededdeea gpdqlplgdg tsgedaersp 100 101 ppdgqwgsql larqlqdfwk ksrntlapqr llfevtsanv vkdppsnstp 150 151 sp