Species	Reference gene ID	Possible function	Papers / DOI
Arabidopsis	At3g13620	Probable cell membrane polyamine/proton symporter involved in the polyamine uptake in cells.	No verified direct reference in this release
Arabidopsis	At5g05630	Cell membrane polyamine/proton symporter involved in the polyamine uptake in cells.	Natural variation in a polyamine transporter determines paraquat tolerance in Arabidopsis.; 2012; DOI: 10.1073/pnas.1121406109; PMID: 22492932; https://pubmed.ncbi.nlm.nih.gov/22492932/
Arabidopsis	At1g31830	Probable cell membrane polyamine/proton symporter involved in the polyamine uptake in cells.	No verified direct reference in this release
Arabidopsis	At3g19553	Probable cell membrane polyamine/proton symporter involved in the polyamine uptake in cells.	No verified direct reference in this release
Arabidopsis	At1g31820	Probable cell membrane polyamine/proton symporter involved in the polyamine uptake in cells.	No verified direct reference in this release