Symporter that cotransports neutral amino acids and sodium ions from the extraccellular to the intracellular side of the cell membrane. The transport is electrogenic, pH dependent and partially tolerates substitution of Na(+) by Li(+). Preferentially transports smaller amino acids, such as glycine, L-alanine, L-serine, L-asparagine and L-threonine, followed by L-cysteine, L-histidine, L-proline and L-glutamine and L-methionine.
Subcellular locations: Cell membrane, Cell projection, Microvillus membrane
Microvillus membrane localization in placenta.