Which of the Following Would Be a Possible Amino Acid

question 11

Multiple Choice

Which of the following would be a possible amino acid sequence for an oligopeptide given the experimental data below?
1) The amino acid composition is found to be [ala, lys, phe, met, cys, plus some decomposition products].
2) The peptide has a molecular weight around 700 Da and absorbs at 280 nm.
3) Treatment with carboxypeptidase results in tryptophan and a peptidE.4.CNBr treatment yields a tetrapeptide and a dipeptidE.5.Trypsin digestion produces an amino acid and a pentapeptide with met on the amino enD.6.Chymotrypsin digestion yields a dipeptide and a tetrapeptidE.

• A) trp-lys-met-cys-met-ala
• B) lys-met-cys-phe-ala-trp
• C) trp-ala-phe-cys-met-lys
• D) lys-ala-cys-phe-met-trp
• E) lys-met-cys-ala-phe-trp

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