Species	Reference gene ID	Possible function	Papers / DOI
Arabidopsis	At2g36990	Sigma factors are initiation factors that promote the attachment of plastid-encoded RNA polymerase (PEP) to specific initiation sites and are then released.	A nuclear-encoded sigma factor, Arabidopsis SIG6, recognizes sigma-70 type chloroplast promoters and regulates early chloroplast development in cotyledons.; 2005; DOI: 10.1111/j.1365-313x.2005.02362.x; PMID: 15807777; https://pubmed.ncbi.nlm.nih.gov/15807777/ | Characterization of soldat8, a suppressor of singlet oxygen-induced cell death in Arabidopsis seedlings.; 2009; DOI: 10.1093/pcp/pcp036; PMID: 19273469; https://pubmed.ncbi.nlm.nih.gov/19273469/ | Interaction of the pentatricopeptide-repeat protein DELAYED GREENING 1 with sigma factor SIG6 in the regulation of chloroplast gene expression in Arabidopsis cotyledons.; 2010; DOI: 10.1111/j.1365-313x.2010.04304.x; PMID: 20626654; https://pubmed.ncbi.nlm.nih.gov/20626654/
Arabidopsis	At1g08540	Required for the transition of plastids into chloroplasts by coordinating nuclear and chloroplastic genomes under light conditions.	No verified direct reference in this release