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Herein, we systemically investigated the interaction between chaperonin GroEL and water\u2010soluble CdTe QDs based on fluorescence correlation spectroscopy (FCS), capillary electrophoresis, and fluorescence spectrometry. We observed that some water\u2010soluble CdTe QDs were able to enter the inner cavity of GroEL and formed an inclusion complex after the activation of chaperonin GroEL with ATP. The inclusion of GroEL was size\u2010selective to QDs and only small QDs were able to enter the inner cavity. The inclusion could suppress the fluorescence quenching of the QDs. Meanwhile, we evaluated the association constant between chaperonin GroEL and CdTe QDs by FCS. Our results further demonstrated that FCS was a very useful tool for study of the interaction of QDs and biomolecules.<\/jats:p>","DOI":"10.1002\/cphc.200800398","type":"journal-article","created":{"date-parts":[[2008,9,26]],"date-time":"2008-09-26T14:18:51Z","timestamp":1222438731000},"page":"2245-2251","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Host\u2013Guest Interaction of Chaperonin GroEL and Water\u2010Soluble CdTe Quantum Dots and its Size\u2010Selective 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