1. Consider the following peptide, with the sequence in 1-letter code: STRETCH S-Serine T-Threonine R-Arginine E-Glutamic...
1. Consider the following peptide, with the sequence in 1-letter code: STRETCH
S-Serine
T-Threonine
R-Arginine
E-Glutamic acid/ Glutamate
C- Cysteine
H- Histidine
-
How many chiral atoms (in total) does this peptide contain? (1)
-
If you have a solution containing 1.5 mmol STRETCH, how many mmol of NaOH
will you need to completely titrate this peptide? (1)
-
Calculate the pI of the peptide STRETCH. Show your work. (3)
-
At which pH will STRETCH have an average net charge of +1.5? (1)
-
Which amino acid side chains in STRETCH will be H-bond acceptors at pH 8.5? (2)
-
Which amino acid side chains in STRETCH be H-bond donors at pH 3.0?
Homework Answers
Add Answer to:
1. Consider the following peptide, with the sequence in 1-letter
code: STRETCH
S-Serine
T-Threonine
R-Arginine
E-Glutamic...
Calculate the pI of a peptide containing Serine, Threonine, Arginine, Glutamic acid, Cysteine and Histidine? Peptide...
Calculate the pI of a peptide containing Serine, Threonine, Arginine, Glutamic acid, Cysteine and Histidine? Peptide written out is: STRETCH
The one-letter sequence is: WATER a) Draw the peptide (R-groups trans), indicating charges, in pr...
The one-letter sequence is: WATER
a) Draw the peptide (R-groups trans), indicating charges, in
predominant form found at pH = 0.
b) What is the isoelectric point?
c) What is the average charge on the population of peptide
macromolecules at pH = 2.2?
d) What is the average charge on the population of peptide
macromolecules at pH = 12.5?
TABLE 4.1 Amino Acid Alanine Arginine Asparagine Aspartic acid Cysteine....« Glutamic acid Glutamine Glycine Histidine Isoleucine Leucine Lysine … Methionine Phenylalanine...
Consider a protein with the acidic side chains, Amino Acid side-chain Arginine pKa = 12.48 Aspartic...
Consider a protein with the acidic side chains, Amino Acid side-chain Arginine pKa = 12.48 Aspartic Acid PKa = 3.90 Cysteine pKa = 8.33 Glutamic acid pKa = 4.07 Histidine pKa = 6.04 Lysine pKa =10.79 Tyrosine pKa =10.13 Given that the pH of blood is about 7.3, how many of the above side chains would be mostly in their ionic form (A-) in blood? 2 3 4 5
The chemical structures of the 20 standard amino acids at pH 7, along with their 3...
The chemical structures of the 20 standard amino acids at pH 7, along with their 3 and 1 letter codes, are givern in alphabetical order below. While the oxygen and nitrogen atoms of the peptide bonds may serve as a donor atom to complex a metal ion, very often the ligands for the metal come from the amino acid side chains. Takea few moments to examine the chemical structures of the different side chains. Circle the side chains that you...
(1) The following diagram represents a titration curve of histidine as pH increases; pKa = 1.82 represents the terminal carboxylic acid group. pK, represents the terminal amino group: 6.0 r...
(1) The following diagram represents a titration curve of histidine as pH increases; pKa = 1.82 represents the terminal carboxylic acid group. pK, represents the terminal amino group: 6.0 represents the R-group, and pK, E 9.17 7.59 pH 182 3.0 20 10 H (equivalents) At what point on the diagram is histidine predominantly present as the following species? COO A, at pH < 1.82 B. between pH 1.82 and pH 6.0 C) between pH 6.0 and pH 9.17 D. at...
Consider the following amino acids for questions 11-13. Choose the best answers. cysteine serine lysine phenylalanine...
Consider the following amino acids for questions 11-13. Choose the best answers. cysteine serine lysine phenylalanine aspartate Which amino acid's R group has a pKa nearest physiological pH? Which amino acid would you most expect to find in the centre of a folded globular protein? Which amino amino acid can be phosphorylated? The overall charge on the peptide (G-R-A-M-P-S) at pH 12.5 is: -1 -0.5 -1.5 +0.5 1 15. What term best describes the protein secondary structure element drawn below:...
C,D, and E i need help with. 17. The following peptide forms part of Human Hemoglobin...
C,D, and E i need help with.
17. The following peptide forms part of Human Hemoglobin subunit gammaa Asp-Leu-Lys-Gly-Thr-Phe-Ala A) Which amino acids are likely to be on the side of peptid acids are likely to be on the side of peptide that faces the interior of the protein? Insert your answer leu, Gto.Pne, Ala B) Which are likely to be facing the aqueous environment? Insert your answer Asp, lys, Thr Draw the structure of the sequence at pH7.4. Using...
questions e-f and g.and k. a) Use the 3 letter symbols for a 6 amino acid...
questions e-f and g.and k.
a) Use the 3 letter symbols for a 6 amino acid peptide chain containing at least one polar and at least one acidic or basic amino acid. (All at physiological pH.) Asp - Gly-Glu-Tyr- Phe- Ala OM b) Draw the primary structure with its peptide bonds, side chains, etc. in the correct order. CH3 NH - E-N -CH. - CH - C- 2-I U=0 -ch- & N-chi- CH₃ CH ₂ Coo CH н My Coo...
1)Match the name of each amino acid with one of its characteristics. 2)has a hydroxy group...
1)Match the name of each amino acid with one of its characteristics. 2)has a hydroxy group its aromatic side chain 3)has a sulfur atom in its side chain that can form disulfide bonds its side chain is a nonpolar isopropyl group 4)it has the smallest acidic side chain 5)this amino acid has the smallest side chain of all, a hydrogen atom 6)its side chain is a methyl group its side chain of 3 carbons forms a 5-membered ring with the...
1. Given the following peptide, which of the following statements is true? Question options: a) The...
1. Given the following peptide, which of the following
statements is true?
Question options:
a) The N-terminal residue is leucine.
b)This peptide contains 4 amino acid residues.
c) The peptide contains a total of 6 ionizable groups.
d) The net charge of this peptide at pH 7 is +1 Locate any
peptide bond along the backbone of the given peptide.
e) The bond between the C (of the C=O) and the N (of the N-H) of
a peptide bond has...
The one-letter sequence is: WATER
a) Draw the peptide (R-groups trans), indicating charges, in
predominant form found at pH = 0.
b) What is the isoelectric point?
c) What is the average charge on the population of peptide
macromolecules at pH = 2.2?
d) What is the average charge on the population of peptide
macromolecules at pH = 12.5?
TABLE 4.1 Amino Acid Alanine Arginine Asparagine Aspartic acid Cysteine....« Glutamic acid Glutamine Glycine Histidine Isoleucine Leucine Lysine … Methionine Phenylalanine...
The chemical structures of the 20 standard amino acids at pH 7, along with their 3 and 1 letter codes, are givern in alphabetical order below. While the oxygen and nitrogen atoms of the peptide bonds may serve as a donor atom to complex a metal ion, very often the ligands for the metal come from the amino acid side chains. Takea few moments to examine the chemical structures of the different side chains. Circle the side chains that you...
(1) The following diagram represents a titration curve of histidine as pH increases; pKa = 1.82 represents the terminal carboxylic acid group. pK, represents the terminal amino group: 6.0 represents the R-group, and pK, E 9.17 7.59 pH 182 3.0 20 10 H (equivalents) At what point on the diagram is histidine predominantly present as the following species? COO A, at pH < 1.82 B. between pH 1.82 and pH 6.0 C) between pH 6.0 and pH 9.17 D. at...
Consider the following amino acids for questions 11-13. Choose the best answers. cysteine serine lysine phenylalanine aspartate Which amino acid's R group has a pKa nearest physiological pH? Which amino acid would you most expect to find in the centre of a folded globular protein? Which amino amino acid can be phosphorylated? The overall charge on the peptide (G-R-A-M-P-S) at pH 12.5 is: -1 -0.5 -1.5 +0.5 1 15. What term best describes the protein secondary structure element drawn below:...
C,D, and E i need help with.
17. The following peptide forms part of Human Hemoglobin subunit gammaa Asp-Leu-Lys-Gly-Thr-Phe-Ala A) Which amino acids are likely to be on the side of peptid acids are likely to be on the side of peptide that faces the interior of the protein? Insert your answer leu, Gto.Pne, Ala B) Which are likely to be facing the aqueous environment? Insert your answer Asp, lys, Thr Draw the structure of the sequence at pH7.4. Using...
questions e-f and g.and k.
a) Use the 3 letter symbols for a 6 amino acid peptide chain containing at least one polar and at least one acidic or basic amino acid. (All at physiological pH.) Asp - Gly-Glu-Tyr- Phe- Ala OM b) Draw the primary structure with its peptide bonds, side chains, etc. in the correct order. CH3 NH - E-N -CH. - CH - C- 2-I U=0 -ch- & N-chi- CH₃ CH ₂ Coo CH н My Coo...
1. Given the following peptide, which of the following
statements is true?
Question options:
a) The N-terminal residue is leucine.
b)This peptide contains 4 amino acid residues.
c) The peptide contains a total of 6 ionizable groups.
d) The net charge of this peptide at pH 7 is +1 Locate any
peptide bond along the backbone of the given peptide.
e) The bond between the C (of the C=O) and the N (of the N-H) of
a peptide bond has...
Most questions answered within 3 hours.
-
Where is the error in this code sequence?
String s1 = "Hello";
String s2 = "ello";...
asked 10 months ago -
Financial data for Joel de Paris, Inc., for last year
follow:
Joel de Paris, Inc.
Balance...
asked 10 months ago -
Consider this reaction:
Al2(SO4)3 (aq)+ BaCl3
(aq) Al2Cl6 (aq)- +
3BaSO4(s) . What is the...
asked 10 months ago -
Suppose that Savneet is considering increasing her
recent random sample from 20 car rentals to 40...
asked 10 months ago -
Trucks arrive at an unloading terminal at an average rate of 120
per hour.
Trucks arrive...
asked 10 months ago -
Why are methanol and ethanol completely soluble in water while
octanol is not very little soluble....
asked 10 months ago -
A facilities manager at a university reads in a research report
that the mean amount of...
asked 10 months ago -
When the CuSO4 is rehydrated by adding water to the anhydrous
compound, is this an endothermic...
asked 10 months ago -
A ray of sunlight is passing from diamond into crown glass; the
angle of incidence is...
asked 10 months ago -
A block of mass 0.249 kg is placed on top of a light, vertical
spring of...
asked 10 months ago -
how do the kidneys compensate in the presences of acidosis
a) trigger hyperventilate
b) reserve acid...
asked 10 months ago -
Question 501 pts
The rental rate of capital to the firm increases. Which of the
following...
asked 10 months ago