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  • Title: [Circular dichroism of cAMP-dependent protein kinase from pig brain].
    Author: Ul'masov KhA, Nesterova MV, Poletaev AI, Severin ES.
    Journal: Biokhimiia; 1981 Sep; 46(9):1609-14. PubMed ID: 6271264.
    Abstract:
    The circular dichroism spectra of phosphorylated and non-phosphorylated forms of cAMP-dependent protein kinase from pig brain and those of the catalytical and regulatory subunits of the enzyme were studied. The percentage of the secondary structure components of the subunits was calculated. cAMP was shown to cause conformational changes of the enzyme. The conformation of the cyclic nucleotide within the cAMP--regulatory subunit complex was established. It was assumed that the conformation of the cAMP molecule during enzyme activation is subjected to inversion.
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