Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
A Cartoon representation of PPE (cyan) in complex with 1 (shown as grey sticks). B Comparison of 1 (grey) and 4 (PDB: 4GVU; orange) binding to PPE (cyan surface). The side chains of PPE residues Ser216 and Arg217 are shown as sticks. The additional hydrogen bond found in the PPE-1 complex structure is indicated by a dashed line.
