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random coil |
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random coil [′ran·dəm ′kȯil] (physical chemistry) Any of various irregularly coiled polymers that can occur in solution. Also known as cyclic coil. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Upon shearing, the conformation of the polymer chain does not obey the random coil dimensions assumed in solution theory, but becomes elongated in the shear field. Molecular dynamics results, which reproduce the measured quasielastic neutron spectra extremely well, show that the observed dynamic changes arise primarily from the particular region of the protein that forms a beta sheet in the native state and unfolds to a random coil in the molten globule. Comparing the size of a random coil in solution is one method for determining the branching character of the sample. |
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