Mucor article cyclic AMP Amylomyces rouxii Blastocladiella emersonii Bovinae Centrifugation, Density Gradient Cyclic AMP Eukaryota Fungi Macromolecular Systems Mammalia Mucor rouxii Protein Binding Protein Kinases Protein sequence Support, Non-U.S. Gov't amino acid amino acid sequence arginine binding affinity cAMP binding chemical structure cyclic AMP dependent protein kinase cyclic AMP derivative density gradient centrifugation dissociation enzyme active site enzymology hybrid protein