1HCC:
reference: Three-dimensional structure of a complement control protein module in solution., Norman DG, Barlow PN, Baron M, Day AJ, Sim RB, Campbell ID, J Mol Biol 1991 Jun 20;219(4):717-25. PMID: 1829116

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