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Models of structural interaction between the hedgehog CoV RBD (light green) and (A) human (beige), (B) dog (blue), (C) cat (purple), (D) fox (orange), (E) badger (grey) and (F) hedgehog (yellow) DPP4. The hedgehog CoV RBD residues that are within 5 Å of the contact surface with DPP4 are shown in red. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)
