1I4M:
reference: Crystal structure of the human prion protein reveals a mechanism for oligomerization., Knaus KJ, Morillas M, Swietnicki W, Malone M, Surewicz WK, Yee VC, Nat Struct Biol 2001 Sep;8(9):770-4. PMID: 11524679

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