Article Bcy1 Bcy1 protein Bcy1 protein, S cerevisiae Chromatography, Gel Circular Dichroism Cyclic AMP-Dependent Protein Kinases D/D domain Models, Molecular Protein Multimerization Protein Structure, Tertiary Protein Subunits Protein kinase A Regulatory subunit Saccharomyces cerevisiae Saccharomyces cerevisiae Proteins Saccharomyces cerevisiae protein Scattering, Small Angle X ray crystallography X ray diffraction X-Ray Diffraction ab initio calculation amino terminal sequence chemistry circular dichroism cross linking cyclic AMP dependent protein kinase docking and dimerization domain genetics homodimer