A polypeptide is shown below. Please answer the following questions.OHВAH;NEa. Match the letter labels to the appropriate components of a polypeptide.carbonyl group[ Select ]amide [ Select ]alpha amino group[ Select ]alpha carboxylic group[ Select ]peptide bond [Select]b. How many peptide bonds are in this polypeptide? [ Select ]V Residues?[ Select ]c. If the second residue were replaced with glutamic acid would the pl increase or decrease?[ Select ]>

A polypeptide is a long, unbranched chain of amino acids joined by peptide/amide bonds. The peptide…

Answered: A polypeptide is shown below. Please…

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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a. How many peptide bonds are there? b. How many amino acid residues are there? c. In exact order, identify the name of the amino acids in the peptide chain. d. Give the full name of this peptide. e. Give the 3-letter abbreviation and 1-letter abbreviation. f. Calculate the pI of this peptide.
Explain why amino acid can increase blood glucose. Write the structure of each of the following peptide at pH7 and identify how many peptide bond in each number. Alanyl-phenylalanine- aspartate- cysteine Threonyl- Isoleucyl-methionyl- leucine Lysyl-alanine -Phenylalanyl-tyrosyl- serine
A peptide has the sequence Glu-His–Trp–Ser-Gly–Leu-Arg-Pro–Gly The pK, values for the peptide's side chains, terminal amino groups, and carboxyl groups are provided in the table. Amino acid Amino pKa Carboxyl pKa Side-chain pKa glutamate 9.60 2.34 4.25 histidine 9.17 1.82 6.00 tryptophan 9.39 2.38 serine 9.15 2.21 glycine 9.60 2.34 leucine 9.60 2.36 arginine 9.04 2.17 12.48 proline 10.96 1.99 Calculate the net charge of the molecule at pH 3. net charge at pH 3:
A. Write the structure of the following peptide at pH 5.0 and calculate its net charge at this pH. Asp-His-Tyr-Arg-Lys-Leu-Thr-Gln. Based on the pKa value of the ionizable groups. B. A polypeptide consisting only of L-glutamate residues (poly-L-glutamate) may have a random coil or helical structure depending on pH. Explain this behavior by indicating at what pH values the helical structure will be favored.
Determine the net charge of the peptide below at pH 7 and 12. Show your solution. Thr-Glu-Pro-Ile-Val-Ala-Pro-Met-Glu-Tyr-Gly-Lys
Draw the Ala-Ser-Leu-Asp polypeptide (perspective formula) showing the fully extended backbone geometry (all angles +/- 180°). Include correct stereochemistry for L-amino acids. Label all bond rotations representing the angles at each residue
Refer to the accompanying figure to answer the following question(s). R R O H- EN-C-C-N-C-C-O-H H H А. В. С. D. E. At which bond would water need to be added to achieve hydrolysis of the peptide, back to its component amino acids? A В D
Write the chemical structure of peptide containing the following amino acid PRO-SER-GLY-LEU I NEED IT ASAP PLEASE
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)
Examine the following peptide and the inserted table, and answer the 2 questions below: Thr-Glu-Pro-Ile-Val-Ala-Pro-Met-Glu-Tyr-Gly-Lys 1. Estimate the net charge of the peptide at pH 2.0. Explain. 2. Estimate the net charge of the peptide at pH 7.0. Explain.
Draw peptide Pro-Ser-Ala-Phe-Glu as you would see it at pH 7. Include stereochemistry.
Answer the questions regarding the tripeptide shown. H3N-CH- -C N-CH-C-N-CH-C-O | CH СНОН H CH2 H3C CH3 CH3 SH Which amino acid is the C-terminal amino acid? threonine cysteine methionine valine What is the name'of this tripeptide, using the three-letter amino acid abbreviations? Capitalize the first let

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A polypeptide is shown below. Please answer the following questions. OH В A C H;N E H D H a. Match the letter labels to the appropriate components of a polypeptide. carbonyl group [Select ] amide [ Select ] >