Sodium-dependent and purine-selective transporter (PubMed:10087507, PubMed:9435697). Exhibits the transport characteristics of the nucleoside transport system cif or N1 subtype (N1/cif) (selective for purine nucleosides and uridine) (PubMed:10087507, PubMed:21795683, PubMed:9435697). Plays a critical role in specific uptake and salvage of purine nucleosides in kidney and other tissues (PubMed:9435697). May contribute to regulate the transport of organic compounds in testes across the blood-testis- barrier (Probable). {ECO:0000269|PubMed:10087507, ECO:0000269|PubMed:21795683, ECO:0000269|PubMed:9435697, ECO:0000305|PubMed:35307651}. This is the function of SLC28A2 (solute carrier family 28 member 2, ENSG00000137860).