NFKB1 and infection: No integration was detected after infection of CCL19-treated resting CD4+ T cells with NL4-3 ΔNF-κB1 or ΔNF-κB1,B2 (Fig. 4b), highlighting the critical role of the first NF-κB site in facilitating HIV integration in CCL19-treated resting CD4+ T cells.