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yulan19992002
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6Â¥2008-03-03 14:02:14
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9Â¥2008-03-04 09:37:38
10Â¥2008-03-04 09:45:26
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dnp(½ð±Ò+2,VIP+0):haha, thank you very much.
dnp(½ð±Ò+2,VIP+0):haha, thank you very much.
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The tryptophan is a probe to indicate the conformation changes of proteins. For instance, the peak shift and intensity decrease of the fluorescence spectrum suggests the Tryptophan residue be more exposure to the polar environment. However, the reason causing this exposure can be the disruption of secondary structure or just local conformation changes. Through CD, it can analyze secondary structure change from observing changes in the range from 190nm to 220nm, while it can also reflect Tryptophan residue envrionment change via analyzing changes near 280 nm. If those two range change is cooperative, it is a proof that secondary structure change induced Tryptophan enviroment change, but not necessarily. For FTIR, through peak fit for the amide I or II band near 1650 cm-1 and 1550 cm-1, you can get the relatively percents of all secondary structure, quantitatively. |
11Â¥2008-03-10 10:56:53













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