Na+-Dependent transmembrane transport of small neutral amino acids, such as glutamine and << alanine >>, is mediated, among others, by the neutral amino acid transporters of the [[ solute carrier 1 ]] [SLC1, alanine serine cysteine transporter 1 (ASCT1), and ASCT2] and SLC38 families [sodium-coupled neutral amino acid transporter 1 (SNAT1), SNAT2, and SNAT4].