1BHD:
reference: The 2.0 A structure of the second calponin homology domain from the actin-binding region of the dystrophin homologue utrophin., Keep NH, Norwood FL, Moores CA, Winder SJ, Kendrick-Jones J, J Mol Biol 1999 Jan 22;285(3):1257-64. PMID: 9887274

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