Enables L-asparagine transmembrane transporter activity; L-glutamine transmembrane transporter activity; and L-histidine transmembrane transporter activity. Involved in several processes, including amino acid transport; female pregnancy; and positive regulation of glutamine transport. Located in basolateral plasma membrane. Is integral component of plasma membrane. Biomarker of metabolic acidosis and visual epilepsy. Orthologous to human SLC38A3 (solute carrier family 38 member 3). [provided by Alliance of Genome Resources, Apr 2022]