Cyclic AMP and the cAMP-dependent protein kinase (PKA) signaling system 3. Isozymes of PKA

3.1. Multiple isoforms of regulatory and catalytic subunits of PKA 3.2. Features of regulatory and catalytic subunits of PKA 3.2. 1. Structure of regulatory subunits 3.2. 2. Structure of catalytic subunits 4. Regulation of levels and expression of the regulatory and catalytic subunits 4.1. Developmental expression of regulatory and catalytic subunits 4.2. Hormonal regulation of PKA in rat Sertoli cells 4.3. Mitogen regulation of PKA in lymphoid cells 4.4. Transcriptional regulation of the genes for PKA subunits 5. PKA isozyme composition and characteristics 6. Subcellular localization of PKA 7. Effects of cAMP mediated by specific isozymes of PKA 7.1. Cyclic AMP effects mediated by PKAI 7.2. Cyclic AMP effects mediated by PKAII 8. Summary and perspectives