2Z1P:
reference: The Enterococcus faecalis MSCRAMM ACE binds its ligand by the Collagen Hug model., Liu Q, Ponnuraj K, Xu Y, Ganesh VK, Sillanpaa J, Murray BE, Narayana SV, Hook M, J Biol Chem. 2007 Jul 6;282(27):19629-37. Epub 2007 Mar 28. PMID: 17392280

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