Interestingly, transdifferentiated BLaER1 cells displayed HIV-1 entry receptor CD4 expression and high surface level expression of both co-receptors CXCR4 and CCR5 indicating that they may be amenable to infection with CCR5- and CXCR4-tropic HIV-1 (Fig. 1C). The gene discussed is CCR5; the disease is infection.