SLC6A15, associated with the plasma membrane, mediates the uptake of a broad range of amino acids plus a sodium ion, transporting branched-chain amiono acids and methionine most efficiently. The human protein is expressed in the brain (Takanaga et al. 2005).
Takanaga, H, Mackenzie, B, Peng, JB, Hediger, MA
amino acid transmembrane transporter activity of SLC6A15 [plasma membrane]
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