https://pubmed.ncbi.nlm.nih.gov/26536134/
Evolutionary Analysis and Classification of OATs, OCTs, OCTNs, and Other SLC22 Transporters:...
The SLC22 family includes organic anion transporters (OATs), organic cation transporters (OCTs) and organic carnitine and zwitterion transporters (OCTNs)....
evolutionaryanalysisclassification