Amino acid transporter that plays an important role in the absorption of amino acids in the intestinal tract. Mediates the uptake of a broad range of neutral and cationic amino acids (with the exception of proline) in a Na(+)/Cl(-)-dependent manner (PubMed:11306607, PubMed:11447016). Transports non-alpha-amino acids such as beta-alanine with low affinity, and has a higher affinity for dipolar and cationic amino acids such as leucine and lysine (By similarity). Can also transport carnitine and propionylcarnitine coupled to the transmembrane gradients of Na(+) and Cl(-) (PubMed:11306651). chloride(out) + glycine(out) + 2 Na(+)(out) = chloride(in) + glycine(in) + 2 Na(+)(in) chloride(out) + L-leucine(out) + 2 Na(+)(out) = chloride(in) + L-leucine(in) + 2 Na(+)(in) chloride(out) + L-glutamine(out) + 2 Na(+)(out) = chloride(in) + L-glutamine(in) + 2 Na(+)(in) chloride(out) + L-arginine(out) + 2 Na(+)(out) = chloride(in) + L-arginine(in) + 2 Na(+)(in) (R)-carnitine(out) + chloride(out) + 2 Na(+)(out) = (R)-carnitine(in) + chloride(in) + 2 Na(+)(in) chloride(out) + 2 Na(+)(out) + O-propanoyl-(R)-carnitine(out) = chloride(in) + 2 Na(+)(in) + O-propanoyl-(R)-carnitine(in) chloride(out) + L-isoleucine(out) + 2 Na(+)(out) = chloride(in) + L-isoleucine(in) + 2 Na(+)(in) chloride(out) + L-methionine(out) + 2 Na(+)(out) = chloride(in) + L-methionine(in) + 2 Na(+)(in) chloride(out) + L-valine(out) + 2 Na(+)(out) = chloride(in) + L-valine(in) + 2 Na(+)(in) chloride(out) + L-alanine(out) + 2 Na(+)(out) = chloride(in) + L-alanine(in) + 2 Na(+)(in) chloride(out) + L-serine(out) + 2 Na(+)(out) = chloride(in) + L-serine(in) + 2 Na(+)(in) chloride(out) + L-cysteine(out) + 2 Na(+)(out) = chloride(in) + L-cysteine(in) + 2 Na(+)(in) chloride(out) + L-asparagine(out) + 2 Na(+)(out) = chloride(in) + L-asparagine(in) + 2 Na(+)(in) chloride(out) + L-threonine(out) + 2 Na(+)(out) = chloride(in) + L-threonine(in) + 2 Na(+)(in) chloride(out) + L-phenylalanine(out) + 2 Na(+)(out) = chloride(in) + L-phenylalanine(in) + 2 Na(+)(in) chloride(out) + L-tryptophan(out) + 2 Na(+)(out) = chloride(in) + L-tryptophan(in) + 2 Na(+)(in) chloride(out) + L-tyrosine(out) + 2 Na(+)(out) = chloride(in) + L-tyrosine(in) + 2 Na(+)(in) chloride(out) + L-histidine(out) + 2 Na(+)(out) = chloride(in) + L-histidine(in) + 2 Na(+)(in) chloride(out) + L-lysine(out) + 2 Na(+)(out) = chloride(in) + L-lysine(in) + 2 Na(+)(in) Expressed in the distal region of the intestinal tract: cecum and colon. Belongs to the sodium:neurotransmitter symporter (SNF) (TC 2.A.22) family. SLC6A14 subfamily.