6SOF:
reference: Cryo-EM structure of the complete and ligand-saturated insulin receptor ectodomain., Gutmann T, Schafer IB, Poojari C, Brankatschk B, Vattulainen I, Strauss M, Coskun U, J Cell Biol. 2020 Jan 6;219(1). pii: jcb.201907210. doi: 10.1083/jcb.201907210. PMID: 31727777

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