Function:Type II regulatory chains mediate membrane association by binding to anchoring proteins , including the MAP2 kinase. ,PTM:Phosphorylated by the activated catalytic chain. ,similarity:Belongs to the cAMP-dependent kinase regulatory chain family. ,similarity:Contains 2 cyclic nucleotide-binding domains. ,subunit:The inactive form of the enzyme is composed of two regulatory chains and two catalytic chains. Activation by cAMP produces two active catalytic monomers and a regulatory dimer that binds four cAMP molecules. ,tissue specificity:Four types of regulatory chains are found: I-alpha , I-beta , II-alpha , and II-beta. Their expression varies among tissues and is in some cases constitutive and in others inducible. ,
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