You've Just Sequenced a New Protein Found in Mice and Observe

question 14

Multiple Choice

You've just sequenced a new protein found in mice and observe that sulfur- containing cysteine residues occur at regular intervals. What is the significance of this finding?

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