Species	Reference gene ID	Possible function	Papers / DOI
Arabidopsis	At3g50660	Catalyzes the C22-alpha-hydroxylation step in brassinosteroids biosynthesis.	Arabidopsis CYP90B1 catalyses the early C-22 hydroxylation of C27, C28 and C29 sterols.; 2006; DOI: 10.1111/j.1365-313x.2005.02639.x; PMID: 16460510; https://pubmed.ncbi.nlm.nih.gov/16460510/ | The DWF4 gene of Arabidopsis encodes a cytochrome P450 that mediates multiple 22alpha-hydroxylation steps in brassinosteroid biosynthesis.; 1998; DOI: 10.1105/tpc.10.2.231; PMID: 9490746; https://pubmed.ncbi.nlm.nih.gov/9490746/
Arabidopsis	At3g13730	Involved in brassinosteroid (BR) biosynthesis.	CYP90C1 and CYP90D1 are involved in different steps in the brassinosteroid biosynthesis pathway in Arabidopsis thaliana.; 2005; DOI: 10.1111/j.1365-313x.2004.02330.x; PMID: 15703058; https://pubmed.ncbi.nlm.nih.gov/15703058/ | C-23 hydroxylation by Arabidopsis CYP90C1 and CYP90D1 reveals a novel shortcut in brassinosteroid biosynthesis.; 2006; DOI: 10.1105/tpc.106.045443; PMID: 17138693; https://pubmed.ncbi.nlm.nih.gov/17138693/
Rice	Os03g0227700	Catalyzes the C22-alpha-hydroxylation step in brassinosteroid biosynthesis, which is the rate-limiting step in this biosynthetic pathway.	Erect leaves caused by brassinosteroid deficiency increase biomass production and grain yield in rice.; 2006; DOI: 10.1038/nbt1173; PMID: 16369540; https://pubmed.ncbi.nlm.nih.gov/16369540/ | Involvement of C-22-hydroxylated brassinosteroids in auxin-induced lamina joint bending in rice.; 2009; DOI: 10.1093/pcp/pcp106; PMID: 19605414; https://pubmed.ncbi.nlm.nih.gov/19605414/