Questions 9-11 are related to the tripeptide shown below: 0=0 H H3N-C-C- N IZ IC- CH2 CH2 CH2 HC +1 CH2 HN NH ΝΗ ΙΟ H₂N NH2 CH2 OH Considering the protonation states of the charged functional groups, what is the most likely pH environment that the peptide is found in? OpH 1 O pH 5 O pH 8 O pH 13

Questions 9-11 are related to the tripeptide shown below: 0=0 H H3N-C-C- N IZ IC- CH2 CH2 CH2 HC +1 CH2 HN NH ΝΗ ΙΟ H₂N NH2 CH2 OH Considering the protonation states of the charged functional groups, what is the most likely pH environment that the peptide is found in? OpH 1 O pH 5 O pH 8 O pH 13

Introduction to General, Organic and Biochemistry

11th Edition

ISBN:9781285869759

Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres

Publisher:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres

Chapter22: Proteins

Section: Chapter Questions

Problem 22.26P

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Similar questions

22-91 Which amino acid does not rotate the plane of polarized light?
22-25 Draw the most predominant form of lysine at its isoelectric point.
22-61 Polyglutamic acid (a polypeptide chain made only of glutamic acid residues) has an a-helix conformation below pH 6.0 and a random-coil conformation above pH 6.0. What is the reason for this conformational change?
22-65 (a) What is the difference in the quaternary structure between fetal hemoglobin and adult hemoglobin? (b) Which can carry more oxygen? (c) What would the oxygen saturation curve of fetal hemoglobin look like compared to that of myoglobin and regular adult hemoglobin?
22-21 Explain why an amino acid cannot exist in an un-ionized form at any pH.
22-89 What kind of noncovalent interaction occurs between the following amino acids? (a) Valine and isoleucine (b) Glutamic acid and lysine (c) Tyrosine and threonine (d) Alanine and alanine
22-48 How many amino acid residues in the A chain of insulin are the same in insulin from humans, cattle (bovine), hogs, and sheep?
22-71 Which amino acid side chain is most frequently involved in denaturation by reduction?
22-31 A polypeptide chain is made of alternating valine and phenylalanine. Which part of the polypeptide is polar (hydrophilic)?
22-59 What is the effect of salt bridges on the tertiary structure of proteins?
For the tripeptide GlyAlaCys a. What amino acid is located at the peptides N-terminal end? b. What amino acid is located at the peptides C-terminal end? c. How many peptide bonds are present? d. How many amide linkages are present?
22-10 Classify the following amino acids as nonpolar, polar but neutral, acidic, or basic. (a) Arginine (b) Leucine (c) Glutamic acid (d) Asparagine (e) Tyrosine (f) Phenylalamne (g) Glycine