Species	Reference gene ID	Possible function	Papers / DOI
Arabidopsis	At2g27450	Involved in polyamine biosynthesis.	No verified direct reference in this release
Arabidopsis	At5g35525	May be involved in heavy metals transport.	No verified direct reference in this release
Arabidopsis	At1g14870	Zinc transporter acting in both zinc extrusion and long-distance zinc transport.	Arabidopsis PCR2 is a zinc exporter involved in both zinc extrusion and long-distance zinc transport.; 2010; DOI: 10.1105/tpc.109.070185; PMID: 20647347; https://pubmed.ncbi.nlm.nih.gov/20647347/
Rice	Os02g0533900	Involved in polyamine biosynthesis.	No verified direct reference in this release