1HZF: C4adg Fragment Of Human Complement Factor C4a
reference: X-ray crystal structure of the C4d fragment of human complement component C4., van den Elsen JM, Martin A, Wong V, Clemenza L, Rose DR, Isenman DE, J Mol Biol 2002 Oct 4;322(5):1103-15. PMID: 12367531

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