7JM3:
reference: Full-length three-dimensional structure of the influenza A virus M1 protein and its organization into a matrix layer., Selzer L, Su Z, Pintilie GD, Chiu W, Kirkegaard K, PLoS Biol. 2020 Sep 30;18(9):e3000827. doi: 10.1371/journal.pbio.3000827., eCollection 2020 Sep. PMID: 32997652

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