Draw the structure of a Schiff base between pyridoxal-5’-phosphate (PLP) and the epsilon (E) amino group...
Draw the structure of a Schiff base between
pyridoxal-5’-phosphate (PLP) and the epsilon (E)
amino
group of lysine of an enzyme.
Homework Answers
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Draw the structure of a Schiff base between
pyridoxal-5’-phosphate (PLP) and the epsilon (E)
amino
group...
Pyridoxal-5’-phosphate (PLP) is a very versatile cofactor in amino acid metabolism. Draw the structure of PLP...
Pyridoxal-5’-phosphate (PLP) is a very versatile cofactor in amino acid metabolism. Draw the structure of PLP on its own and as a Schiffbase linked with the amino acid serine. Use your structure of the Schiffbase to point out three different reactions that could be catalyzed with the help of an enzyme after forming a Schiffbase between PLP and serine.
Explain the basis for the following statement: As a coenzyme, pyridoxal phosphate is covalently bound to...
Explain the basis for the following statement: As a coenzyme, pyridoxal phosphate is covalently bound to enzymes with which it functions, yet during catalysis the coenzyme is not covalently bound. Match the words in the left column to the appropriate blanks in the sentences on the right. Reset Help e-amino carboxylic acid PLP forms a covalent between the carbon of the coenzyme and an group of a lysine residue in the active site of the enzyme. This bond must be...
Both amino acid decarboxylase and tryptophan synthase are enzymes involving pyridoxal phosphate (PLP) in their mechanisms....
Both amino acid decarboxylase and tryptophan synthase are
enzymes involving pyridoxal phosphate (PLP) in their mechanisms.
There are both similarities and differences between the two
mechanisms. For each of the statements describing a mechanism
feature, indicate whether it is a feature of the decarboxylase, the
synthase, or both.
Amino acid decarboxylase Tryptophan synthase Both Answer Bank PLP forms a quinonoid structure when electrons are delocalized from the amino acid. Active sites on two different subunits are involved in the reaction....
01. Transamination is a biochemical reaction by which the –NH2 group of one amino acid is...
01. Transamination is a biochemical reaction by which the –NH2 group of one amino acid is transferred to another alpha-ketoacid for preparation of a new amino acid. This reaction is catalyzed by the transaminase, which uses _____ as a cofactor for formation of the catalytic intermediate _______ base. Select one: a. TPP ;;;; Lewis b. TPP ;;;; Schiff c. PLP ;;;; Lewis d. PLP ;;;; Schiff e. None of these
01. Transamination is a biochemical reaction by which the –NH2 group of one amino acid is...
01. Transamination is a biochemical reaction by which the –NH2 group of one amino acid is transferred to another alpha-ketoacid for preparation of a new amino acid. This reaction is catalyzed by the transaminase, which uses _____ as a cofactor for formation of the catalytic intermediate _______ base. Select one: a. TPP ;;;; Lewis b. TPP ;;;; Schiff c. PLP ;;;; Lewis d. PLP ;;;; Schiff e. None of these
#9 quaternary structure. d. This kinetic plot implies that compound "Y" is an activator of this...
#9
quaternary structure. d. This kinetic plot implies that compound "Y" is an activator of this "Michaelis Menten" enzyme. e. Compound "X" binds to a regulatory site on the enzyme 02 and "shifts" the equilibrium to the more active "R" form. 8. Consider the Lineweaver Burk plot of an inhibition experiment of procaine esterase. Which of the following is correct concerning the information indicated by this information? The inhihitor can complex a. n. 6) The KM value is smaller in...
5. The chemical properties of an amino acid is determined by a. structure of it's group...
5. The chemical properties of an amino acid is determined by a. structure of it's group b. it's central carbon molecule c. structure of it's amino group d. hydrogen molecule e. it's carboxyl group 6. Different amino acids are joined by dehydration synthesis to make proteins. How many different amino acids are there? a. 15 b. 30 c. 20 d. 25 e. 40 7. Lipids are composed of a fits b. sugar c. glycerol d. A and C e. A...
of alanine has a pk of 9.87. What is the 153, The amino group charge on...
of alanine has a pk of 9.87. What is the 153, The amino group charge on that amino group at pH 7.0 145. Which amino acid serves as the first amino acid at the hN terminus of a newly synthesized protein? (B) methionine (A) alanine 9.80. The side chain of that amino acid includes (A) an amine group (C) a carboxylic acid group. (D) an alcohol 154. A certain amino acid has a pl (or pH, isoelectric point) (D) threonine...
26. Which of the following classification does not match the amino acid side chain A) Contains an basic group/ lysi...
26. Which of the following classification does not match the amino acid side chain A) Contains an basic group/ lysine B) It is polar C) Forms disulfide bond/ cysteine D) Forms hydrogen bonds with neighbors/ alanine serine 27. All amino acids found in proteins are L-amino acids EXCEPT the achiral. A) glutamate B) Lysine C) glyeine D) Alamine 28. The plH at which the positive and negative charges of an amino acid balance each ofher is called the A) isotonic...
Draw DNA with the sequence 5’-ACTAG-3’. Label the sugar ring, the phosphate, the base, the 5’...
Draw DNA with the sequence 5’-ACTAG-3’. Label the sugar ring, the phosphate, the base, the 5’ end and the 3’ end of the molecule. Across from it, draw the sequence it would bind to, labeling the sugar ring, the phosphate, the base, the 5’ end and 3’ end. When drawing out the DNA sequence, please draw it out with atom symbols (such as O, P, H, C, etc) and their bond type (such as single bond ( --) or double...
Explain the basis for the following statement: As a coenzyme, pyridoxal phosphate is covalently bound to enzymes with which it functions, yet during catalysis the coenzyme is not covalently bound. Match the words in the left column to the appropriate blanks in the sentences on the right. Reset Help e-amino carboxylic acid PLP forms a covalent between the carbon of the coenzyme and an group of a lysine residue in the active site of the enzyme. This bond must be...
Both amino acid decarboxylase and tryptophan synthase are
enzymes involving pyridoxal phosphate (PLP) in their mechanisms.
There are both similarities and differences between the two
mechanisms. For each of the statements describing a mechanism
feature, indicate whether it is a feature of the decarboxylase, the
synthase, or both.
Amino acid decarboxylase Tryptophan synthase Both Answer Bank PLP forms a quinonoid structure when electrons are delocalized from the amino acid. Active sites on two different subunits are involved in the reaction....
#9
quaternary structure. d. This kinetic plot implies that compound "Y" is an activator of this "Michaelis Menten" enzyme. e. Compound "X" binds to a regulatory site on the enzyme 02 and "shifts" the equilibrium to the more active "R" form. 8. Consider the Lineweaver Burk plot of an inhibition experiment of procaine esterase. Which of the following is correct concerning the information indicated by this information? The inhihitor can complex a. n. 6) The KM value is smaller in...
5. The chemical properties of an amino acid is determined by a. structure of it's group b. it's central carbon molecule c. structure of it's amino group d. hydrogen molecule e. it's carboxyl group 6. Different amino acids are joined by dehydration synthesis to make proteins. How many different amino acids are there? a. 15 b. 30 c. 20 d. 25 e. 40 7. Lipids are composed of a fits b. sugar c. glycerol d. A and C e. A...
of alanine has a pk of 9.87. What is the 153, The amino group charge on that amino group at pH 7.0 145. Which amino acid serves as the first amino acid at the hN terminus of a newly synthesized protein? (B) methionine (A) alanine 9.80. The side chain of that amino acid includes (A) an amine group (C) a carboxylic acid group. (D) an alcohol 154. A certain amino acid has a pl (or pH, isoelectric point) (D) threonine...
26. Which of the following classification does not match the amino acid side chain A) Contains an basic group/ lysine B) It is polar C) Forms disulfide bond/ cysteine D) Forms hydrogen bonds with neighbors/ alanine serine 27. All amino acids found in proteins are L-amino acids EXCEPT the achiral. A) glutamate B) Lysine C) glyeine D) Alamine 28. The plH at which the positive and negative charges of an amino acid balance each ofher is called the A) isotonic...
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