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OpenStudy (anonymous):
A student heats a test tube containing a large amount of protien and biuret reagent. she notices a color change from violet to blue. explain why
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OpenStudy (anonymous):
By heating the solution you are denaturing the proteins (breaking down the polypeptide bonds that hold proteins together. The color change indicates the loss of peptide bonds. Blue to violet indicates the presence of peptides, violet to blue indicates the loss there-of.
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