تم الحل ✓
categoryالكيمياء
schoolبكالوريوس
event_available2026-07-15
السؤال
Transcribed Image Text:
16. You have purified a new peptide hormone. To determine its amino acid sequence you have
digested the polypeptide with trypsin and in a separate reaction you have cleaved the polypeptide
with cyanogen bromide. Show all of your work for full credit!!! (4 pts)
Cleavage with trypsin yielded 5 peptides that were sequenced by Edman degradation as shown in the
following.
1. Ser-Leu
2. Asp-Val-Arg
3. Val-Met-Glu-Lys
4. Ser-Gln-Met-His-Lys
5. Ile-Phe-Met-Leu-Cys-Arg
Cleavage with cyanogen bromide yielded 4 peptides that were sequenced by Edman degradation:
1. His-Lys-Ser-Leu
2. Asp-Val-Arg-Val-Met
3. Glu-Lys-lle-Phe-Met
4. Leu-Cys-Arg-Ser-Gln-Met
Determine the sequence of the peptide (N- to C-terminal) and identity the identity of the N-terminal
amino acid after reconstructing the intact protein.
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