SNX21 GI:111118961 sorting nexin 21 isoform d 1 mhrgtqegam asrllhrlrh alagdgpgea aaspeaeqfp esseleddda 50 51 eglssrlsgt lsftsaedde ddededdeea gpdqlplgdg tsgedaersp 100 101 ppdgqwgsql larqlqdfwk ksrntlapqr llfevtsanv vkdppskyvt 150 151 nlsstpsp