Species	Reference gene ID	Possible function	Papers / DOI
Arabidopsis	At1g08230	High affinity gamma-aminobutyric acid (GABA) transporter probably involved in GABA uptake into cells.	AtGAT1, a high affinity transporter for gamma-aminobutyric acid in Arabidopsis thaliana.; 2006; DOI: 10.1074/jbc.m510766200; PMID: 16407306; https://pubmed.ncbi.nlm.nih.gov/16407306/
Arabidopsis	At5g41800	May be involved in the transport of GABA.	No verified direct reference in this release
Arabidopsis	At2g36590	Proline transporter that mediates proline and glycine betaine transport.	The AtProT family. Compatible solute transporters with similar substrate specificity but differential expression patterns.; 2005; DOI: 10.1104/pp.104.055079; PMID: 15618414; https://pubmed.ncbi.nlm.nih.gov/15618414/
Arabidopsis	At3g55740	Proline transporter that mediates proline and glycine betaine transport.	Identification and characterization of GABA, proline and quaternary ammonium compound transporters from Arabidopsis thaliana.; 1999; DOI: 10.1016/s0014-5793(99)00516-5; PMID: 10359089; https://pubmed.ncbi.nlm.nih.gov/10359089/ | The AtProT family. Compatible solute transporters with similar substrate specificity but differential expression patterns.; 2005; DOI: 10.1104/pp.104.055079; PMID: 15618414; https://pubmed.ncbi.nlm.nih.gov/15618414/ | In planta function of compatible solute transporters of the AtProT family.; 2011; DOI: 10.1093/jxb/erq320; PMID: 20959625; https://pubmed.ncbi.nlm.nih.gov/20959625/ | Salt stress-induced proline transporters and salt stress-repressed broad specificity amino acid permeases identified by suppression of a yeast amino acid permease-targeting mutant.; 1996; DOI: 10.1105/tpc.8.8.1437; PMID: 8776904; https://pubmed.ncbi.nlm.nih.gov/8776904/
Rice	UniProt: Q69LA1	Proline transporter that mediates proline transport across the plasma membrane.	No verified direct reference in this release