Species	Reference gene ID	Possible function	Papers / DOI
Arabidopsis	At1g75440	Accepts the ubiquitin from the E1 complex and catalyzes its covalent attachment to other proteins.	No verified direct reference in this release
Arabidopsis	At5g42990	Accepts the ubiquitin from the E1 complex and catalyzes its covalent attachment to other proteins.	No verified direct reference in this release
Arabidopsis	At1g45050	Accepts the ubiquitin from the E1 complex and catalyzes its covalent attachment to other proteins.	Functional expression and molecular characterization of AtUBC2-1, a novel ubiquitin-conjugating enzyme (E2) from Arabidopsis thaliana.; 1993; DOI: 10.1007/bf00029013; PMID: 8219072; https://pubmed.ncbi.nlm.nih.gov/8219072/
Arabidopsis	At4g36410	Accepts the ubiquitin from the E1 complex and catalyzes its covalent attachment to other proteins.	No verified direct reference in this release