2X9K:
reference: Correlation between the OmpG secondary structure and its pH-dependent alterations monitored by FTIR., Korkmaz-Ozkan F, Koster S, Kuhlbrandt W, Mantele W, Yildiz O, J Mol Biol. 2010 Aug 6;401(1):56-67. Epub 2010 Jun 16. PMID: 20561532

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