using darpp-32 ( dopamine- and cyclic amp-regulated phosphoprotein , mr 32,000 ) as exogenous substrate , and performing assays in the absence or presence of the protein inhibitor of cyclic amp-dependent protein kinase , we have now identified both cyclic amp-dependent and cyclic gmp-dependent protein kinase activities in the rat neostriatum and substantia nigra .
C0031689
phosphoprotein
C0033684
protein