Cyclic compounds can rotate and/or slide along a polymeric chain in a polyrotaxane structure, and the mobility of the ligands linked by the cyclic compounds is closely related to enhancing the multivalent interaction with binding sites on the receptor proteins. This concept is being exploited in more practical applications in the biomedical and pharmaceutical fields, such as a non-viral gene carriers.
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Yui et al. (2006) studied this question.
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