SLC1A4 and infection: The resulting ASCT2 KO or the ASCT1 and ASCT2 (ASCT1+2) double KO cells were selected based on their resistance to infection with either eGFP encoding RD114TR-pseudotyped LV vectors for ASCT2 KO cells or BaEVRLess-pseudotyped vectors for ASCT1+2 KO cells.