4XST:
reference: Structural Congruency of Ligand Binding to the Insulin and Insulin/Type 1 Insulin-like Growth Factor Hybrid Receptors., Menting JG, Lawrence CF, Kong GK, Margetts MB, Ward CW, Lawrence MC, Structure. 2015 May 19. pii: S0969-2126(15)00174-4. doi:, 10.1016/j.str.2015.04.016. PMID: 26027733

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