5VQN:
reference: Identification of the I38T PA Substitution as a Resistance Marker for Next-Generation Influenza Virus Endonuclease Inhibitors., Jones JC, Kumar G, Barman S, Najera I, White SW, Webby RJ, Govorkova EA, MBio. 2018 Apr 24;9(2). pii: mBio.00430-18. doi: 10.1128/mBio.00430-18. PMID: 29691337

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).