Although Raji-WT cells exhibited only 3-fold worse trans-infection than Raji-DC-SIGN+ cells (indicating that perhaps there were other attachment receptors on the surface of Raji cells that could contribute to viral transfer), the augmented trans-infection signal for Raji-DC-SIGN+ cells was large enough for us to continue with the capture assays (Figure S4). This evidence concerns the gene CD209 and infection.