Which of the Following Changes Would Not Alter the Functional

question 18

Multiple Choice

Which of the following changes would not alter the functional characteristics of α keratin?

• A)Increasing the number of residues per turn to 4.1 while maintaining the same amino acid sequence.
• B)Substitution of a hydrophilic amino acid for a hydrophobic amino acid at position a and d of the 7-residue pseudorepeat.
• C)Decreasing the number of cysteine amino acids within each protofilament.
• D)Changing the environment surrounding the protein to one that is more reductive.
• E)All of the above would alter the functional characteristics of keratin.

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