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Calculate the pI for the following tri-peptide: Glu-Arg-Lys
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- 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)Draw Glu-His-Trp-Ser-Gly-Leu-Arg-Pro-Gly peptide. What is the net charge of this peptide at pH 3, 8 and 11? What can you say about pI value of this peptide?Indicate all the possible sequences for a tripeptide containing alanine, glutamine, and methionine; use the standard abbreviation for each amino acid (Ala, Gln, Met).
- Consider the following peptide: Lys-His-Asp-Glu-Phe-Cys-Ala-Asp-His-Arg What is the net charge of this peptide at pH = 1? What is the net charge of this peptide at pH = 14?Draw a peptide for cys-asn- pro-gly (Using the same format in picture)Draw the structure of the peptide: Val-His-Leu-Thr-Pro-Val-Glu-Lys-Ser-Ala-Val-Thr What is the significance of the peptide described?
- Write the chemical structure of peptide containing the following amino acid PRO-SER-GLY-LEUPLEASE DRAW the structure of the peptide: Val-His-Leu-Thr-Pro-Val-Glu-Lys-Ser-Ala-Val-Thr and describe what its significance is.Draw the titration curves for the following AA’s: Aspartic acid, Alanine, Lysine, Valine, Serine, and Trrosine.
- You have isolated the following peptide: His-Ser-Arg-Ala-Glu-Leu-Pro-Gly A) Calculate the approximate charge of this peptide at pH 1, pH 3, pH 5, pH8, pH 11, and pH 14. B) What is the PI of this peptide?Which peptide has a larger pI? Arg-Gly-Gly-Gly or Gly-Gly-Gly-Arg why?Following the IUPAC rules for naming small peptides, assign a name for Leu–Lys–Trp–Met