The isoelectric point (pl) of phenylalanine is pH 5.5. Draw the structure of the major form of glutamic acid at pH values of (a) 1 (b) 5.5 (c) 11.0.

Q: Give the full name of the amino acid and based on the structure of the side chain is it hydrophobic…

A: Concept:  Amino acid:Amino acids are organic molecules which combine to form proteins molecule.…

Q: At pH 7.4, the pH of blood plasma, do the majority of protein-derived amino acids bear a net…

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Q: Predict products of the acylation and esterification of amino acids, and their reactionwith…

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Q: At very low pH, alanine is a diprotic acid that can be represented as H3N1-CH(CH3)-COOH. The pKa of…

A: A diprotic acid contains two types of acidic groups. The amino acid contains these two groups: 1.…

Q: Assume that the side chain of Asp has a pka of 4.51. At what pH will the side chain be half-…

A: When pH < pKa then Asp (aspartic amino acid) protonated When pH > pKa Then Asp deprotonated…

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A: A question about biochemistry, which is to be accomplished.

Q: A. Lysine is considered a basic amino acid containing a guanidino group. If all ionizable protons…

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Q: Draw the structures of the amino acids phenylalanine and aspartate in the ionization state you would…

A: We have been asked to draw the structures of phenylalanine and aspartate at pH = 7 We have been…

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Q: Draw the structure of the tetrapeptide Asp-Arg-Val-Tyr. Please show the appropriate stereochemistry…

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Q: Calculate the standard free-energy changes of the following metabolically important enzyme-…

A: a.

Q: In carbonic anhydrase II, Zn* acts as a Lewis acid coordinated in the enzyme active site to…

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Q: Reaction of the a-carboxyl group of an amino acid or peptide with phenylisothiocyanate allows for…

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Q: Draw Tryptophan in a peptide bond. Explain all of the bonds using valence bond theory (VBT). Next,…

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Q: For lysine and arginine, the isoelectric point, pI, occurs at a pH where the net charge on the…

A: The isoelectric point for the amino acid Lysine can be calculated by using the pKa values of α-amino…

Q: The amino acid His is triprotic with pK1 (α-COOH) = 1.82, pK2 (α-NH3+) = 9.17, and pK3 (side chain)…

A: If the pKa of acid is equal or lower than the pH of the solution then the acid will get deprotonated…

Q: draw the primary structure of the peptide DKMMS at pH 7.4 and name this peptide and what chain…

A: Primary structure of a peptide refers to the amino acid sequence in the peptide.

Q: Using alanine as an example, draw possible conformations of alanine in a peptide chain (Ala-Met-Thr)…

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Q: Calculate the pH at which the e-amino group of lysine is 25% dissociated.

A: Step : 1             Calculate the pH at which the e-amino group of lysine is 25% dissociated.

Q: What is the approximate ratio of the base to acid forms of the amino acid glutamate contained within…

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Q: Explain why the pI of lysine is the average of the pKa values of its two protonated amino groups.

A: First the lysine structure is noted as follows,

Q: The pKa of the amino and carboxyl groups on alanine are 9.9 and 2.4, respectively. Under…

A: pKa of amino group=9.9 pKa of carboxyl group=2.4 pH=7.4

Q: What trend can you suggest for the stability of proteins under varying pH

A: As we decrease the pH (by adding acid ) converts COO- ion to a neutral COOH group. In each case the…

Q: The amino group can be protonated (that is, it has an extra proton attached) in a strongly acidic…

A: Since you have posted multiple sub part, we are doing first 3 for you .To do rest of the subpart…

Q: Draw the structure of the pentapeptide alanine-leucine- phenylalanine-glycineUisoleucine. Assume…

A: Given: The structure of pentapeptide alanine-leucine-phenylalanine-glycine-isoleucine has to be…

Q: Identify an amino acid that complies with the following characteristic: (Write the COMPLETE name) A…

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Q: Give the amino acid sequence of each peptide using the fragments obtained by partial hydrolysis of…

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Q: Give the numbers of peptide bond present in given structure, structure is given at pH 10.5,  find…

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Q: Where is the effective buffering range for this amino acid in the acidic region?

A: Buffer is the solution that resists change in pH when small amount of acid or base is added to it.…

Q: what is isoelectric ph and calculate for glutamic acid?

A: A point where molecule carried no net charge called isoelectric point.

Q: Draw all ionic structures for an amino acid under acidic and basic conditions, and identify the…

A: Given information,        Amino acid under acidic and basic conditions, and the zwitterion.

Q: which amino acids has a side chains with a conjugate acid form that is neutral?

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Q: Illustrate the lONlZATlON STRUCTURES and determine the isoelectric point (pI) of the given amino…

A: We have to illustrate the lONlZATlON STRUCTURES and determine the isoelectric point (pI) of the…

Q: Alanine has pKa values of 2.34 and 9.69. Therefore, alanine exists predominately as a zwitterion in…

A: More the pH value; less the value of pKa, for alanine at pKa, alpha-COOH = 2.34, the deprotonation…

Q: Tyrosine is an amino acid whose side chain has a pKa of 10.1. At pH 7, what protonation form would…

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Q: ine is a diprotic amino acid with a pk = 2.344 for the carboxylic group and a pK, = 9.868 for the…

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Q: Calculate the isoelectric pH of this peptide: His-Tyr

A: Here we are required to find the isoelectric point pH of the peptide.

Q: Given: Alanine: pKa=4 Pkb=9 Histidine: pKa=2 pKb=6 and pKc=9   Taking the structure of the amino…

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Q: Provide the chemical structure for the following peptide:  A-C-E

A: The amino acid corresponds to the given one letter code is as follows,A – alanineC- cysteineE-…

Q: Draw the sequential transition of glutamic acid as it passes from its fully protonated form to its…

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Q: Determine the buffer capacity of Alanine and Histidine at pH 2.0 and 6.0 respectively and discuss…

A: For the alanine, the value for pKa is 2.34. Now the salt to amino acid ratio to achieve the pH of…

Q: An amino acid residue side chain is deprontonated at pH9.5. What is the pKa of this residue if it is…

A: an animo acid is a biomolecule which as both basic amine group and acidic group ( carboxylic acid)…

Q: Draw the structure of the following molecule The amino acid phenylalanine at pH 1

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Q: Which of the common amino acids is not chiral? Sketch its structure and explain why it does not…

A: Glycine is the amino acid which not chiral i.e, Achiral. The structure of Glycine  H2N - CH2C ( = O…

Q: Although the bond energy for the hydrogen bond in a vacuum is estimated to be about 20 kJ/mol, we…

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Q: Guanidine and the guanidino group present in arginine are two of the strongest organic bases known.…

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Q: For the amino acid glutamate, what fraction of the side-chain (R-group) will be ionized at pH = 3.5?…

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Q: A direct current was passed through a solution containing valine histidine and aspartic acid at a pH…

A: When the electricity is passed, the amino acids move based on their charge.