You Have Just Sequenced a New Protein Isolated from Mice

question 19

Multiple Choice

You have just sequenced a new protein isolated from mice and observe that sulfur-containing cysteine residues occur at regular intervals. "This finding is most consistent with which of the following claims about the protein?

• A) Cysteine residues are required for the formation of α helices and β pleated sheets.
• B) It will be important to include cysteine in the diet of the mice.
• C) Cysteine residues are involved in disulfide bridges that help form tertiary structure.
• D) Cysteine causes bends, or angles, to occur in the tertiary structure of proteins.

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