3KCV:
reference: Structure of the formate transporter FocA reveals a pentameric aquaporin-like channel., Wang Y, Huang Y, Wang J, Cheng C, Huang W, Lu P, Xu YN, Wang P, Yan N, Shi Y, Nature. 2009 Nov 26;462(7272):467-72. PMID: 19940917

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