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(d) A heptapeptide was found to have an amino acid composition of Asp, Leu, Lys, Met, Phe and Tyr. Trypsin has no effect on the heptapeptide. One cycle of Edman degradation renders: CH2 NH Chymotrypsin treatment yields a dipeptide and a tetrapeptide, as well as a free amino acid. The tetrapeptide is known to contain Leu, Lys, and Met. Cyanogen bromide treatment generates a dipeptide, a tetrapeptide, and free Lys. Determine the amino acid sequence of the heptapeptide. Show how you obtain your answer.

(d) A heptapeptide was found to have an amino acid composition of Asp, Leu, Lys, Met, Phe and Tyr. Trypsin has no effect on the heptapeptide. One cycle of Edman degradation renders: CH2 NH Chymotrypsin treatment yields a dipeptide and a tetrapeptide, as well as a free amino acid. The tetrapeptide is known to contain Leu, Lys, and Met. Cyanogen bromide treatment generates a dipeptide, a tetrapeptide, and free Lys. Determine the amino acid sequence of the heptapeptide. Show how you obtain your answer.

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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(d) A heptapeptide was found to have an amino acid composition of Asp, Leu, Lys, Met, Phe and Tyr. Trypsin has no effect on the heptapeptide. One cycle of Edman degradation renders: CH NH Chymotrypsin treatment yields a dipeptide and a tetrapeptide, as well as a free amino acid. The tetrapeptide is known to contain Leu, Lys, and Met. Cyanogen bromide treatment generates a dipeptide, a tetrapeptide, and free Lys. Determine the amino acid sequence of the heptapeptide. Show how you obtain your answer.
Transcribed Image Text:(d) A heptapeptide was found to have an amino acid composition of Asp, Leu, Lys, Met, Phe and Tyr. Trypsin has no effect on the heptapeptide. One cycle of Edman degradation renders: CH NH Chymotrypsin treatment yields a dipeptide and a tetrapeptide, as well as a free amino acid. The tetrapeptide is known to contain Leu, Lys, and Met. Cyanogen bromide treatment generates a dipeptide, a tetrapeptide, and free Lys. Determine the amino acid sequence of the heptapeptide. Show how you obtain your answer.
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