Species	Reference gene ID	Possible function	Papers / DOI
Arabidopsis	At1g50490	Accepts the ubiquitin from the E1 complex and catalyzes its covalent attachment to other proteins.	Molecular characterization of plant ubiquitin-conjugating enzymes belonging to the UbcP4/E2-C/UBCx/UbcH10 gene family.; 2002; DOI: 10.1104/pp.011353; PMID: 12427990; https://pubmed.ncbi.nlm.nih.gov/12427990/
Arabidopsis	At3g20060	Accepts the ubiquitin from the E1 complex and catalyzes its covalent attachment to other proteins.	Molecular characterization of plant ubiquitin-conjugating enzymes belonging to the UbcP4/E2-C/UBCx/UbcH10 gene family.; 2002; DOI: 10.1104/pp.011353; PMID: 12427990; https://pubmed.ncbi.nlm.nih.gov/12427990/ | UBC19 is a new interacting protein of ORANGE for its nuclear localization in  Arabidopsis thaliana .; 2021; DOI: 10.1080/15592324.2021.1964847; PMID: 34405771; https://pubmed.ncbi.nlm.nih.gov/34405771/