Control experiments ruled out any effect of putative sialic acid moieties of sVEGF-R1 in NB324K infection (Figure 4D, right lanes) and showed the sVEGF-R1 effective binding capacity to VEGF in solution (Figure 4E) as well as to cell surface (Starzec et al., 2006) (Figure 4F). Here, VEGFA is linked to infection.