Amino acid sequence of the UbcB ORF and comparison to UBCs from a variety of organisms. Names and accession numbers are given below. UBC1, this article; ScUBC5, Saccharomyces cerevisiae UBC5, acccession no. P15732; HsUBC2, human UBC2, accession no. P35129; CeUBC2, C. elegans UBC2, accession no. P35129; ScUBC4, S. cerevisiae UBC4, accession no. P15731; DmUBC1, Drosophila melanogaster UBC1, accession no. P25867; ScUBC5, S. cerevisiae UBC5, accession no. P15732; AtUBC1, Arabidopsis thaliana UBC1, ac. # P25865; RnUBC, rat, accession no. P23567; HsHHR6A, human UBC, accession no. P06104; ScUBC21, S. cerevisiae UBC21, accession no. P06104; ScUBC1, S. cerevisiae UBC1, accession no. P21734; ScUBC8, S. cerevisiae UBC8, accession no. P28263; Dmben, D. melanogaster Bendless (UBC), accession no. P35128.