Even though they induce only limited PAN-specific lectin binding when transfected into HEKΔSiaO cells (19% for ST3Gal1, 6% for ST3Gal2, Figure 2B), they induced efficient HU02Av−H5 infection of HEKΔSiaO cells (138% by ST3Gal1 and 129% by ST3Gal2, relative to HEKWT cells) and HEKΔSiaGSL cells (36% and 12%) albeit less efficiently (Figures 3A-a, 3A-b, and 3B). This evidence concerns the gene ST3GAL1 and infection.