2MHL:
reference: NMR Polypeptide Backbone Conformation of the E. coli Outer Membrane Protein W., Horst R, Stanczak P, Wuthrich K, Structure. 2014 Jul 9. pii: S0969-2126(14)00176-2. doi:, 10.1016/j.str.2014.05.016. PMID: 25017731

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