Enables L-arginine transmembrane transporter activity. Acts upstream of or within L-arginine transmembrane transport. Predicted to be located in apical plasma membrane and basolateral plasma membrane. Predicted to be part of protein-containing complex. Predicted to be active in plasma membrane. Is expressed in several structures, including alimentary system; brain; cranium; genitourinary system; and immune system. Orthologous to human SLC7A1 (solute carrier family 7 member 1). [provided by Alliance of Genome Resources, Apr 2022]