1AAP:
reference: X-ray crystal structure of the protease inhibitor domain of Alzheimer's amyloid beta-protein precursor., Hynes TR, Randal M, Kennedy LA, Eigenbrot C, Kossiakoff AA, Biochemistry 1990 Oct 30;29(43):10018-22. PMID: 2125487

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