Specific enzyme subunits that form the active sites of the type I and type II cyclic-AMP protein kinases. Each molecule of enzyme contains two catalytic subunits.

Synonyms: Protein Kinase A, Catalytic Subunits EC 2.7.11.11 Cyclic AMP Dependent Protein Kinase Catalytic Subunits cAMP Dependent Protein Kinase, alpha Catalytic Subunit Cyclic AMP-Dependent Protein Kinase Catalytic Subunits cAMP-Dependent Protein Kinase, beta-Catalytic Subunit cAMP-Dependent Protein Kinase, alpha-Catalytic Subunit cAMP Dependent Protein Kinase, gamma Catalytic Subunit cAMP Dependent Protein Kinase, beta Catalytic Subunit cAMP-Dependent Protein Kinase, gamma-Catalytic Subunit