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The compactness of ribonuclease A with intact disulfide bonds and reduced ribonuclease A was investigated by synchrotron small-angle X-ray scattering. The R g values and the Kratky plots showed that non-reduced ribonuclease A maintain a compact shape with a R g value of about 17.3 9 in 8 M urea. The reduced ribonuclease A is more expanded, its R g value is about 20 9 in...
The denaturation of dimeric creatine kinase (CK) induced by urea and guanidine hydrochloride (GuHCl) has been studied by small angle X-ray scattering (SAXS), which is a direct way to measure the changes in the overall dimensions of a protein molecule. The radii of gyration (R g ) of CK are 29±0.4 Å in the native state and 46±1.5 Å in the unfolded state in either 8 M urea or 3 M GuHCl. The...
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