Consider an a-helix secondary structure. a. Propose a 12-residue amino acid sequence that(assuming it folded into an a-helix) would yield a structure in which six of the residues, each with an ionizable side-chain were within a 135° region on one face of the helix, and use an appropriate diagram to support your choice of sequence. b. Would it be possible to generate an especially stable helix by correctly choosing the charges on the side-chains? Please justify your answer.

Biochemistry
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Chapter1: Biochemistry: An Evolving Science
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Consider an a-helix secondary structure.
a. Propose a 12-residue amino acid sequence that(assuming it folded into
an a-helix) would yield a structure in which six of the residues, each with an ionizable side-chain were within a 135° region on one face of the helix, and use an appropriate diagram to support your choice of sequence.
b. Would it be possible to generate an especially stable helix by correctly choosing the charges on the side-chains? Please justify your answer.

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