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A close up of the P1 pocket of the model of the thiol compound 1i bound to the active site of ACE2 based on a X-ray co-crystal structure (PDB code 1R4L). The ACE2 carbons are colored cyan with inhibitor 1i carbons colored green. 510Tyr is colored in orange to highlight its putative role in the selectivity of 1i. The semi-transparent gray surface represents the molecular surface. This figure was generated using PYMOL version 1.00 (Delano Scientific, www.pymol.org).
