URM1 GI:209693464 ubiquitin related modifier 1 homolog isoform b 1 maaplsveve fgggaellfd gikkhrvtlp gqeepwdirn lliwikknll 50 51 kerpelfiqg dsvrpgilvl indadwellv stlgdipppa palaasvgkr 100 101 waspqahiew lgnppphssp tlrllesptp geegmgswgh gstpps