Species	Reference gene ID	Possible function	Papers / DOI
Arabidopsis	At1g64230	Accepts the ubiquitin from the E1 complex and catalyzes its covalent attachment to other proteins.	No verified direct reference in this release
Arabidopsis	At5g41700	Accepts the ubiquitin from the E1 complex and catalyzes its covalent attachment to other proteins.	Genome analysis and functional characterization of the E2 and RING-type E3 ligase ubiquitination enzymes of Arabidopsis.; 2005; DOI: 10.1104/pp.105.067983; PMID: 16339806; https://pubmed.ncbi.nlm.nih.gov/16339806/
Arabidopsis	At5g53300	Accepts the ubiquitin from the E1 complex and catalyzes its covalent attachment to other proteins.	No verified direct reference in this release
Arabidopsis	At4g27960	Accepts the ubiquitin-like protein SUMO/SMT3 from the E1 complex and catalyzes its covalent attachment to other proteins.	No verified direct reference in this release