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In the presence of denaturant and thiol initiator, the native bovine pancreatic trypsin inhibitor (BPTI) denatures by shuffling its native disulfide bonds and converts to a mixture of scrambled isomers. The extent of denaturation is evaluated by the relative yields of the scrambled and native species of BPTI. BPTI is an exceedingly stable molecule and can be effectively denatured only by guanidine...
Reversible conversion between the native and scrambled proteins can be applied to analyze the denaturation curve of a disulfide-containing protein. In the case of RNase A, scrambled species could not be well separated from the native species by HPLC to permit precise quantitative analysis of the extent of denaturation. Methods are developed here to overcome this problem. The methods exploit the difference...
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