Zecha et al. (41) integrated the results from Gordon et al. (56) with their own quantitative data on the host proteomes of four relevant cell lines (human ACE2-A549, Caco-2, Calu-3, and African green monkey Vero E6) finding 56 interacting host proteins differing quantitatively during infection of Vero E6 cells (Zecha et al.; Figure 4C, supplemental Fig. S8D) (41). This evidence concerns the gene ACE2 and infection.