Enables L-amino acid transmembrane transporter activity. Acts upstream of or within L-amino acid transport. Predicted to be located in membrane. Predicted to be integral component of membrane. Is expressed in several structures, including alimentary system; blood island; liver; neural ectoderm; and nose. Orthologous to human SLC43A1 (solute carrier family 43 member 1). [provided by Alliance of Genome Resources, Apr 2022]