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Conjugation and Fluorescence quenching between bovine serum albumin and L-cysteine capped CdSe/CdS quantum dots
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نویسنده
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wang q. ,ye f. ,liu p. ,min x. ,li x.
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منبع
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protein and peptide letters - 2011 - دوره : 18 - شماره : 4 - صفحه:410 -414
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چکیده
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Water-soluble,biological-compatible,and excellent fluorescent cdse/cds quantum dots (qds) with l-cysteine as capping agent were synthesized in aqueous medium. fluorescence (fl) spectra,absorption spectra,and transmission electron microscopy (tem) were employed to investigate the quality of the products. the interactions between qds and bovine serum albumin (bsa) were studied by absorption and fl titration experiments. with addition of qds,the fl intensity of bsa was significantly quenched which can be explained by static mechanism in nature. when bsa was added to the solution of qds,fl intensity of qds was faintly quenched. fluorescent imaging suggests that qds can be designed as a probe to label the escherchia coli (e. coli) cells. these results indicate cdse/cds/l-cysteine qds can be used as a probe for labeling biological molecule and bacteria cells. © 2011 bentham science publishers ltd.
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کلیدواژه
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Biological labeling; CdSe/CdS; Fluorescence; L-cysteine; Quantum dots
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آدرس
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state key laboratory of advanced technology for materials synthesis and processing,wuhan university of technology,wuhan 430070,china,department of chemistry,school of sciences,wuhan university of technology, China, department of chemistry,school of sciences,wuhan university of technology, China, department of chemistry,school of sciences,wuhan university of technology, China, state key laboratory of advanced technology for materials synthesis and processing,wuhan university of technology,wuhan 430070,china,department of chemistry,school of sciences,wuhan university of technology, China, department of chemistry,school of sciences,wuhan university of technology, China
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Authors
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