At what pH can you separate the following peptides: ala-ala-ala glu-glu-glu, his-his-his? A. 2.0 B. 4.0 C. 5.0 OD. 7.0 E. 9.5

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Q: Calculate the pI for the following tri-peptide: Glu-Arg-Lys

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Q: In a sample solution given to be analyzed; Starch + Val-Gly-Ile-Trp-Lys-Gly-Ala-Gly-Val-Glu  Plan…

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Q: What is the difference between the structures of the following two peptides: Name them.…

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Q: Draw the structure of the peptide: Val-His-Leu-Thr-Pro-Val-Glu-Lys-Ser-Ala-Val-Thr

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Q: 1. A simplified structure of the peptide Lys-Glu-Ser with just the ionizable groups in the charged…

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Q: Give the amino acid sequence of an octapeptide that contains the amino acids Tyr, Ala, Leu (2…

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Q: Porcine dynorphin is a neuropeptide having 17 amino acid residues. Its structure is shown below.…

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Q: A peptide was treated with Sanger's reagent followed by hydrolysis with 6M HCl for 24 hours at 105…

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Q: Consider the following pKa values: terminal amino group: 9.5; C = 8.2; Y = 10.1; K= 10.5; terminal…

A: Isoelectronic point is defined as the pH at which the amino acid does not move in an electric field.…

Q: Consider the following peptide sequence: Lys-Leu-Ile-Cys-Lys What is the net charge of this…

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Q: Draw the structure of Phe-Ser-Met-Glu, and indicate where the peptide bonds are.

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Q: Draw the structure of the tetrapeptide 1. H,N - Lys - Ser-Asp- Ala - COOH Assign IUPAC names to each…

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Q: Using the amino acid phenylalanine, draw and specify the nature of each following tertiary structure…

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Q: The oligopeptide isolated from the brain of an animal has the sequence…

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Q: The following reaction scheme shows the states of the amino acid hisitdine. Histidine has three…

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Q: Draw the structure of the following peptide as it would be at pH = 7. Does the molecule have a net…

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Q: Consider the peptides Ser-Glu-Gly-His-Ala and Gly-His-Ala-Glu-Ser. How do these two peptides differ?

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Q: Which of the following is TRUE? Select one: a. The disulfide bridges formed by oxidation of the…

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Q: Determine the net charge of the following peptide at pH 10 given the respective pKa's. DDDMCRVNAY…

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Q: What are the charges of the following amino acids peptides at ph 14? 1. GLAVV 2. RRKKQ

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Q: Calculate the isoelectric point for each amino acid.a. asparagine: pKa (COOH) = 2.02; pKa (α-NH3+) =…

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Q: The following sequence of amino acids are part of adult hemoglobin from the N-terminus. DRAW THE…

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Q: For the peptide Ala-Cys-His-Ile-Leu-Asp a. Write the single letter code for the amino acid residues…

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Q: Draw the structure of the PTH derivative you would obtain by Edman degredation of the peptide: ALPF.

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Q: Write the chemical structure of peptide containing the following amino acid PRO-SER-GLY-LEU

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Q: Draw the structure of peptide with the following amino acids Gly-Leu-Ala-Gly-Pro-Hyp. The structure…

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Q: Given the following peptides below, what would be more soluble at the indicated pH? 1. (Gly)20 or…

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Q: What types of interactions are possible between the side chains of the polypeptide shown below?…

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Q: Which of the following is true A) The disulfide bridges formed by reduction of the sulfhydryl…

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Q: Decide if the side chains of the following peptides are nonpolar or polar,and label the hydrophobic…

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