Species	Reference gene ID	Possible function	Papers / DOI
Arabidopsis	At5g21930	Mediates copper transfer across the chloroplast thylakoid membrane.	No verified direct reference in this release
Arabidopsis	At4g33520	Mediates copper transfer across the plastid envelope.	Biochemical characterization of AtHMA6/PAA1, a chloroplast envelope Cu(I)-ATPase.; 2011; DOI: 10.1074/jbc.m111.241034; PMID: 21878617; https://pubmed.ncbi.nlm.nih.gov/21878617/