Human embryonic kidney (HEK 293T) cells stably expressing a luciferase-YFP fusion protein [36], were transduced, at a multiplicity of infection of 2, with LV-PGK-SO, or with a control lentivirus, LV-PGK-ST, in which the coding sequence for Oatp1 was replaced with that of Timd2 [43]. Here, SLCO1A2 is linked to infection.