Journal
BIOLOGICAL TRACE ELEMENT RESEARCH
Volume 130, Issue 2, Pages 172-184Publisher
HUMANA PRESS INC
DOI: 10.1007/s12011-009-8322-0
Keywords
Chromium; Bovine serum albumin; Fluorescence quenching; Thermodynamic parameters
Funding
- National Natural Science Foundation of China [20873096, 20621502]
- Science Research Foundation of Chinese Ministry of Education [[2006]8IRT0543]
- Natural Science Foundation of Hubei Province [2005ABC002]
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In the present work, the interactions of bovine serum albumin (BSA) with chromium (III) chloride, potassium dichromate, and chromate were studied by fluorescence, circular dichroism, and UV-vis absorbance spectroscopy. Fluorescence quenching of BSA by chromium (III) was found to be a dynamic process in the beginning, turning static at later stages. Spectroscopic data show that both dichromate and chromate bind in similar electrostatic fashion to BSA and does not follow the fluorescence quenching observation for chromium(III).
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