UBE2V1 GI:12025663 ubiquitin-conjugating enzyme E2 variant 1 isoform c 1 mkedlnlenf taktiyenri yslkiecgpk ypeappfvrf vtkinmngvn 50 51 ssngvvdpra isvlakwqns ysikvvlqel rrlmmskenm klpqppegqc 100 101 ysn