How does the fragmentation of a peptide at a single bond help in determining the sequence of amino acids?

• A. It creates b and y ions that can be analyzed to determine the sequence.
• B. It results in a single peak that represents the entire peptide.
• C. It causes the peptide to lose all its amino acids.
• D. It only provides information about the peptide's mass, not its sequence.

Answer: (A)