Species	Reference gene ID	Possible function	Papers / DOI
Arabidopsis	At1g64860	Essential protein.	No verified direct reference in this release
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
Rice	Os08g0163400	Sigma factors are initiation factors that promote the attachment of plastid-encoded RNA polymerase (PEP) to specific initiation sites and are then released (Probable).	The plastid sigma factor SIG1 maintains photosystem I activity via regulated expression of the psaA operon in rice chloroplasts.; 2007; DOI: 10.1111/j.1365-313x.2007.03216.x; PMID: 17651366; https://pubmed.ncbi.nlm.nih.gov/17651366/