Suppose That the Peptide Ala-Met-Lys-Ser Is Reacted with Phenylisothiocyanate at PH

question 32

Multiple Choice

Suppose that the peptide Ala-Met-Lys-Ser is reacted with phenylisothiocyanate at pH 8.0,followed by mild acidification,which is the first cycle of Edman method? Which of the following would be released?

• A)the labelled peptide Ala-Met-Lys-Ser-PTH
• B)PTH-Ala,PTH-Ser,PTH-Lys,and PTH-Met
• C)PTH-Ser and the peptide Ala-Met-Lys
• D)PTH-Ala and the peptide Met-Lys-Ser

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