1KOE:
reference: Crystal structure of the angiogenesis inhibitor endostatin at 1.5 A resolution., Hohenester E, Sasaki T, Olsen BR, Timpl R, EMBO J 1998 Mar 16;17(6):1656-64. PMID: 9501087

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