Among the high-affinity GABA transporters, GAT-2 is the only one expressed in peripheral tissues in addition to brain and retina (Borden et al, 1992; Liu et al, 1993; Ikegaki et al, 1994), therefore it is very likely that GAT-2 is also the ALA transporter in murine mammary adenocarcinoma cells. Here, SLC6A12 is linked to breast adenocarcinoma.