6QX3:
reference: Structures of influenza A virus RNA polymerase offer insight into viral genome replication., Fan H, Walker AP, Carrique L, Keown JR, Serna Martin I, Karia D, Sharps J, Hengrung N, Pardon E, Steyaert J, Grimes JM, Fodor E, Nature. 2019 Sep;573(7773):287-290. doi: 10.1038/s41586-019-1530-7. Epub 2019 Sep, 4. PMID: 31485076

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