1XN3:
reference: Structural locations and functional roles of new subsites S5, S6, and S7 in memapsin 2 (beta-secretase)., Turner RT 3rd, Hong L, Koelsch G, Ghosh AK, Tang J, Biochemistry 2005 Jan 11;44(1):105-12. PMID: 15628850

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