SLC1 (Neutral amino acid transporter B(0), ATB(0), Sodium-dependent neutral amino acid transporter type 2, RD114/simian type D retrovirus receptor, Baboon M7 virus receptor) has a broad substrate specificity, a preference for zwitterionic amino acids, and a sodium-dependence. It accepts as substrates all neutral amino acids, including glutamine, asparagine, and branched-chain and aromatic amino acids, and e, Xenopus/Amphibian,cludes methylated amino acids, anionic amino acids, and cationic amino acids. SLC1 acts as a cell surface receptor for feline endogenous virus RD114, baboon M7 endogenous virus and type D simian retroviruses