5VPK:
reference: Crystal structures of mite allergens Der f 1 and Der p 1 reveal differences in surface-exposed residues that may influence antibody binding., Chruszcz M, Chapman MD, Vailes LD, Stura EA, Saint-Remy JM, Minor W, Pomes A, J Mol Biol. 2009 Feb 20;386(2):520-30. Epub 2008 Dec 30. PMID: 19136006

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