Phosphorus-31 nuclear magnetic resonance pH titration studies of the phosphoproteins tropomyosin and glycogen phosphorylase a.

Abstract

31P nuclear magnetic resonance (NMR), pH titration studies of the phosphoproteins tropomyosin and glycogen phosphorylase a (in the presence of the inhibitor glucose) show that the resonances for the phosphoserine regulatory sites shift with pH. Analysis of line widths indicates that both residues have considerable mobility. These results are in agreement… (More)

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