Species	Reference gene ID	Possible function	Papers / DOI
Arabidopsis	At3g53720	May act as a K⁺/H⁺ antiporter that maintains guard-cell K⁺ homeostasis and regulates pH.	Participation of endomembrane cation/H+ exchanger AtCHX20 in osmoregulation of guard cells.; 2007; DOI: 10.1104/pp.106.092155; PMID: 17337534; https://pubmed.ncbi.nlm.nih.gov/17337534/
Arabidopsis	At4g23700	Operates as a K(+)/H(+) antiporter that controls K(+) acquisition and homeostasis.	Characterization of AtCHX17, a member of the cation/H+ exchangers, CHX family, from Arabidopsis thaliana suggests a role in K+ homeostasis.; 2004; DOI: 10.1111/j.1365-313x.2004.02177.x; PMID: 15341627; https://pubmed.ncbi.nlm.nih.gov/15341627/ | Arabidopsis thaliana CHX17 gene complements the kha1 deletion phenotypes in Saccharomyces cerevisiae.; 2006; DOI: 10.1002/yea.1424; PMID: 17133624; https://pubmed.ncbi.nlm.nih.gov/17133624/
Arabidopsis	At5g41610	May operate as a cation/H(+) antiporter.	No verified direct reference in this release
Arabidopsis	At3g17630	May operate as a cation/H(+) antiporter.	No verified direct reference in this release
Arabidopsis	At1g64170	May operate as a cation/H(+) antiporter.	No verified direct reference in this release