Species	Reference gene ID	Possible function	Papers / DOI
Arabidopsis	At5g19180	Catalytic subunit of the dimeric ECR1-AXR1 E1 enzyme.	The Arabidopsis cullin AtCUL1 is modified by the ubiquitin-related protein RUB1.; 1999; DOI: 10.1073/pnas.96.26.15342; PMID: 10611386; https://pubmed.ncbi.nlm.nih.gov/10611386/ | The ubiquitin-related protein RUB1 and auxin response in Arabidopsis.; 1998; DOI: 10.1126/science.280.5370.1760; PMID: 9624055; https://pubmed.ncbi.nlm.nih.gov/9624055/