6BYS:
reference: Structures of the PKA RIalpha Holoenzyme with the FLHCC Driver J-PKAcalpha or Wild-Type PKAcalpha., Cao B, Lu TW, Martinez Fiesco JA, Tomasini M, Fan L, Simon SM, Taylor SS, Zhang P, Structure. 2019 Mar 15. pii: S0969-2126(19)30079-6. doi:, 10.1016/j.str.2019.03.001. PMID: 30905674

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