This family includes several putative integral membrane proteins which have been predicted as the putative subunit of transporters for D-alanine or lactate (See Supplementary note 5 in [1]).

1: Mutant phenotypes for thousands of bacterial genes of unknown function. Price MN, Wetmore KM, Waters RJ, Callaghan M, Ray J, Liu H, Kuehl JV, Melnyk RA, Lamson JS, Suh Y, Carlson HK, Esquivel Z, Sadeeshkumar H, Chakraborty R, Zane GM, Rubin BE, Wall JD, Visel A, Bristow J, Blow MJ, Arkin AP, Deutschbauer AM; Nature. 2018;557:503-509. PMID:29769716