4JPH:
reference: Structure of Protein Related to Dan and Cerberus: Insights into the Mechanism of Bone Morphogenetic Protein Antagonism., Nolan K, Kattamuri C, Luedeke DM, Deng X, Jagpal A, Zhang F, Linhardt RJ, Kenny AP, Zorn AM, Thompson TB, Structure. 2013 Jul 9. pii: S0969-2126(13)00206-2. doi:, 10.1016/j.str.2013.06.005. PMID: 23850456

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