5W4S:
reference: Structural Basis of Protein Kinase Calpha Regulation by the C-Terminal Tail., Yang Y, Shu C, Li P, Igumenova TI, Biophys J. 2018 Apr 10;114(7):1590-1603. doi: 10.1016/j.bpj.2017.12.030. PMID: 29642029

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