SLC20A2 and viral infectious disease: By evaluating viral infection using Mus dunni tail fibroblast (MDTF) cells, MDTF cells expressing feline Pit1 (MDTF-fePit1), and MDTF cells expressing feline Pit2 (MDTF-fePit2), we found that the FeLV-B strain from ON-C (AH927/ON-C/#9 cells) infected MDTF-fePit1 cells, whereas the FeLV-B strains from ON-T (293T/ON-T/#3) infected both MDTF-fePit1 and MDTF-fePit2 cells (Table 3).