Enables neurotransmitter transmembrane transporter activity and purine nucleoside transmembrane transporter activity. Involved in adenosine transport; neurotransmitter uptake; and purine nucleoside transmembrane transport. Acts upstream of or within nucleoside transport. Is active in plasma membrane. Orthologous to human SLC29A2 (solute carrier family 29 member 2). [provided by Alliance of Genome Resources, Apr 2022]