1FNS:
reference: von Willebrand factor conformation and adhesive function is modulated by an internalized water molecule., Celikel R, Ruggeri ZM, Varughese KI, Nat Struct Biol 2000 Oct;7(10):881-4. PMID: 11017197

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