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《Environmental Science & Technology》 2009-02
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Bonding Mechanism of Dibutyltin with Human Serum Albumin by Fluorescence Spectrometry

SUN Xiao-lei, LIU Dan (School of Environmental Science and Engineering,Southwest Jiaotong University,Chengdu 610031,China)  
Bonding mechanism of human serum albumin(HSA) and dibutyltin(DBT) that is the degradation product of tributyltin(TBT)which is main component of antifouling paint of ships on molecular level was investigated by fluorescence spectrometry for finding out the way and degree of mutual combination. Results revealed that fluorescence quenching arose mainly from static quenching by complex formation when DBT/HAS less than 3. Micro-region of tryptophan residues and tyrosine residues which contribute intrinsic fluorescence to HAS is appreciably influenced by DBT. Results of studies provide theoretical foundation for the interaction of DBT and HAS.
【CateGory Index】: R114
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