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| has gloss | (noun) entropy calculated from the probability that a state could be reached by chance alone conformational entropy |
| has gloss | eng: Conformational entropy is the entropy associated with the physical arrangement of a polymer chain that assumes a compact or globular state in solution. The concept is most commonly applied to biological macromolecules such as proteins and RNA, but can also be used for polysaccharides and other polymeric organic compounds. To calculate the conformational entropy, the possible conformations assumed by the polymer may first be discretized into a finite number of states, usually characterized by unique combinations of certain structural parameters, each of which has been assigned an energy level. In proteins, backbone dihedral angles and side chain rotamers are commonly used as descriptors, and in RNA the base pairing pattern is used. These characteristics are used to define the degrees of freedom (in the statistical mechanics sense of a possible "microstate"). The conformational entropy associated with a particular conformation is then dependent on the probability associated with the occupancy of that state, as determined by the sum of the energies associated with the value of each parameter assumed in the state. |
| lexicalization | eng: conformational entropy |
| subclass of | (noun) (thermodynamics) a thermodynamic quantity representing the amount of energy in a system that is no longer available for doing mechanical work; "entropy increases as matter and energy in the universe degrade to an ultimate state of inert uniformity" randomness, entropy, S |
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| similar | e/Conformational entropy |
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