The shape of hair is determined in part by the pattern of disulfide bonds in keratin, its major protein.  How can curls be induced?  Explain chemically the basic steps (type of chemical and order) of what a hairstylist would use to treat the hair.

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ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
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Chapter1: Biochemistry: An Evolving Science
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The shape of hair is determined in part by the pattern of disulfide bonds in keratin, its major protein.  How can curls be induced?  Explain chemically the basic steps (type of chemical and order) of what a hairstylist would use to treat the hair. 

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The hair is composed of the protein keratin, which is fibrous in structure. These proteins are highly cross-linked. 

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