2ODY:
reference: Isolation, cloning and structural characterisation of boophilin, a multifunctional kunitz-type proteinase inhibitor from the cattle tick., Macedo-Ribeiro S, Almeida C, Calisto BM, Friedrich T, Mentele R, Sturzebecher J, Fuentes-Prior P, Pereira PJ, PLoS ONE. 2008 Feb 20;3(2):e1624. PMID: 18286181

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