Pro-Ser-Ala-Phe-Glu. Draw this peptide at pH 7 and include its stereochemistry.
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Pro-Ser-Ala-Phe-Glu. Draw this peptide at pH 7 and include its stereochemistry.
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- Leu-Trp-Phe-Met-Ala-Ile-Val- Draw the structure of the peptide at pH7.4. and Indicate the hydrogen bonds formed in the alpha helix.Rotation about the peptide bond in glycylglycine ishindered. Draw the resonance forms of the peptide bondand explain why.Ala-Arg-Val-His-Asp-Gln Given the polypeptide chain above Estimate the net charge of the polypeptide chain at physiological pH (7.4) and at pH 5.0 . How many peptide bonds are there? What kind of polypeptide is it?
- Asp-Gly-Lys-Glu-Ile-Phe Draw its full chemical structure as it would exist at pH = 7.0. Draw an arrow pointing to each peptide bond. Identify the net charge of the peptide and briefly explain how you arrived at this answer.Rotation about the peptide bond in glycylalanine is hindered. Draw the resonance forms of the peptide bond and explain why.One round of Edman degradation of the peptide: H2N- Gly-Arg-Lys- Phe-Asp- COOH which of the following structures would result when add cyanogen bromide ? A) H2N-Gly-Arg-COOH + H2N–Lys-Phe- Asp-COOH B) H2N-Arg-Lys-Phe-Asp-C0OH+ Gly C) H2N- Gly-Arg-Lys-Phe-Asp- COOH D) H2N-Gly-Arg-Lys-Phe-COOH + Asp E) H2N-Gly-Arg-Lys-COOH + H2N-Phe-Asp-COOH
- Calculate the pI for the following peptide: Phe-Lys-Glu-Asp-Lys-Ser-Ala (note: there is only one alpha carboxyl at the C terminus and one alpha amino group at the N terminus and don't forget to take into account the ionizable side chain groups)structure of valine at pH of 12Consider the peptide Trp-Arg-Glu-Cys-Gly-Tyr. For the drawings requested below, please show them in zig-zag style, from amino to carboxy terminus, with correct stereochemistry Draw the predominant form at pH = 2 Draw the predominant form at pH = 5 Draw the predominant form at pH = 7 Draw the predominant form at pH = 12
- why the notation Ala-Gly-Val-Ala and Ala-Val-Gly-Ala represent two different molecules rather than the same molecule.The peptide with sequence GVPLT has antioxidant properties. Draw the chemical structure of this peptide at pH 7Consider N-acetyl-d-glucosamine Q.) Draw a chair conformation for the a- and b-pyranose forms of this monosaccharide.