Enables L-aspartate transmembrane transporter activity and L-serine transmembrane transporter activity. Involved in amino acid transport. Predicted to be located in basal plasma membrane. Predicted to be integral component of membrane. Predicted to be active in plasma membrane. Orthologous to human SLC1A5 (solute carrier family 1 member 5). [provided by Alliance of Genome Resources, Apr 2022]