2FEC:
reference: Separate ion pathways in a cl-/h+ exchanger., Accardi A, Walden M, Nguitragool W, Jayaram H, Williams C, Miller C, J Gen Physiol. 2005 Dec;126(6):563-70. PMID: 16316975

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