>sp|P51965-2|UB2E1_HUMAN Isoform 2 of Ubiquitin-conjugating enzyme E2 E1 OS=Homo sapiens OX=9606 GN=UBE2E1 MKEVGRPREVRGRPGKSRIQKELADITLDPPPNCSAGPKGDNIYEWRSTILGPPGSVYEG GVFFLDITFTPEYPFKPPKVTFRTRIYHCNINSQGVICLDILKDNWSPALTISKVLLSIC SLLTDCNPADPLVGSIATQYMTNRAEHDRMARQWTKRYAT