4DIN:
reference: Localization and quaternary structure of the PKA RIbeta holoenzyme., Ilouz R, Bubis J, Wu J, Yim YY, Deal MS, Kornev AP, Ma Y, Blumenthal DK, Taylor SS, Proc Natl Acad Sci U S A. 2012 Jul 31;109(31):12443-8. Epub 2012 Jul 13. PMID: 22797896

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