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Abstract

ANALYSIS OF INTERACTION OF HUMAN HEMOGLOBIN WITH QUERCETIN: FLUORESCENCE SPECTROSCOPIC AND MOLECULAR MODELING APPROACH

S. Bakkialakshmi* and Jayoti Roy

ABSTRACT

Quercetin (3,3',4',5,7-pentahydroxyflavone), a plant derived flavonoid posseses a wide range of therapeutic properties such as anti-oxidant, anti-cancer, anti-tumor, etc. The purpose of this communication is to examine the interaction of Quercetin with natural drug carrier, Human hemoglobin (Hb) utilizing absorption spectroscopy, steady-state fluorescence and synchronous fluorescence spectroscopy and molecular modeling. The results indicated that quercetin caused strong fluorescence quenching of Hb by static quenching mechanism. Stern-Volmer study indicates that static along with quenching mechanisms are accountable for the quenching of protein fluorescence by quercetin. Molecular docking studies support the interactions between Hb and quercetin as observed from spectroscopic studies.

Keywords: Human hemoglobin, quercetin, steady-state fluorescence, synchronous fluorescence, molecular docking study.


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