AS Biology Coursework - protein/copper sulphate

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I'm doing the effect of copper sulphate on egg albumen (an example of a protein).

The protein is denatured as its ionic bonds are broken (going from tertiary to secondary structure) but I don't know how exactly it works. Could anyone tell me/direct me to a site that could explain?

Thanks
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www.studyzone.com
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Copper ions form strong bonds with carboxylate anions on the amino acids that form part of the peptide bond. This forms a new set of ionic bonds, disrupts the peptide links.
Changes the structure from tertiary to secondary.

Hope that helps!!
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