Which of the Following Statements About Cystine Is Correct

question 67

Multiple Choice

Which of the following statements about cystine is correct?

• A)Cystine forms when the -CH₂-SH R group is oxidized to form a -CH₂-S-S-CH₂- disulfide bridge between two cysteines.
• B)Cystine is an example of a nonstandard amino acid,derived by linking two standard amino acids.
• C)Cystine is formed by the oxidation of the carboxylic acid group on cysteine.
• D)Cystine is formed through a peptide linkage between two cysteines.
• E)Two cystines are released when a -CH₂-S-S-CH₂- disulfide bridge is reduced to -CH₂-SH.

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