Biochemistry: Methionine is an essential amino acid yet we have an enzyme that can make methionine...
Biochemistry: Methionine is an essential amino acid yet we have an enzyme that can make methionine from homocysteine. Why then is methionine essential in the diet?
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Biochemistry: Methionine is an essential amino acid yet we have
an enzyme that can make methionine...
Biochemistry 1. A) Tetrahydrobiopterin serves an essential role in the biosynthesis of one amino acid and...
Biochemistry 1. A) Tetrahydrobiopterin serves an essential role in the biosynthesis of one amino acid and several neurotransmitters. What is its function in all those reactions? B) Pyridoxal P (or pyridoxamine P) is an essential cofactor for what reaction during formation of tryptamine, dopamine and serotonin? What reaction does it facilitate there? C) Tetrahydrofolate is a vitamin. Why is it required for methionine resynthesis? From what non-protein amino acid is methionine resynthesized? D) What amino acid provides the C skeleton...
The following a-keto acid can be used as a substitute for a specific essential amino acid...
The following a-keto acid can be used as a substitute for a specific essential amino acid in the diet. Explain how this is possible, draw the structure of the amino acid it replaces, and name that amino acid.
1. The pKa's of the amino acid methionine are 2.28 and 9.21. The zwitterion of methionine...
1. The pKa's of the amino acid methionine are 2.28 and 9.21. The zwitterion of methionine is given below (1). S Н,с NH3 (a) Explain why structure (I) is an intermediate ion. Write balanced chemical reactions to support your reasoning (b) Draw the conjugate acid AND conjugate base form of the amino acid shown above (c) A 15-mL aliquot solution consisted 0.25M of the zwitterion of methionine and 0.30M of its conjugate acid was titrated with 0.15M NaOH, calculate the...
Font Ратауар 15. Excess essential amino acids may be stored as: a) proteins. b) glycogen. c)...
Font Ратауар 15. Excess essential amino acids may be stored as: a) proteins. b) glycogen. c) fats. d) a) and (or just) c, depending on the amino acid. e) b) and (or just) c, depending on the amino acid. 16. Some non-essential amino acids are non-essential because they are made in you but only: a) if certain essential amino acids are present in your diet. b) if pyruvate or certain TCA cycle intermediates are present in your diet. c) if...
1. The pKa's of the amino acid methionine are 2.28 and 9.21. The zwitterion of methionine is given below (I) S H3C...
1. The pKa's of the amino acid methionine are 2.28 and 9.21. The zwitterion of methionine is given below (I) S H3C O NH3 (a) Explain why structure (I) is an intermediate ion. Write balanced chemical reactions to support your reasoning. (b) Draw the conjugate acid AND conjugate base form of the amino acid shown above (c) A 15-mL aliquot solution consisted 0.25M of the zwitterion of methionine and 0.30M of its conjugate acid was titrated with 0.15M N2OH, calculate...
Essential, or indispensable amino acids, must be consumed in the diet. All of the following are...
Essential, or indispensable amino acids, must be consumed in the diet. All of the following are essential amino acids except methionine. alanine. isoleucine. lysine. Why might consuming a vegetarian diet reduce your risk of heart disease? Plant sources of protein are lower in saturated fatty acids and cholesterol than are animal protein sources. Plant sources of protein are lower in unsaturated fatty acids than are animal protein sources. Plant sources of protein have less fiber than do animal protein sources....
If an essential amino acid is missing, the protein strand will _____. a. be completed with...
If an essential amino acid is missing, the protein strand will _____. a. be completed with substitute essential amino acids b. halt production until an essential amino acid is available c. break down and return the surplus amino acids to the bloodstream d. use nonessential amino acids instead e. use the shorter strands to make up the protein Which statement about dietary protein is accurate? a. It should supply the nonessential amino acids. b. When food energy is limited, dietary...
If you have an enzyme that has a primary sequence that is 429 amino acids in...
If you have an enzyme that has a primary sequence that is 429 amino acids in length, is it possible that both an amino acid position 215, as well as amino acids located at 342, and 401, can all be part of an active site of a protein? Explain why or why not?
essential fatty acids essential amino acids Your diet provides C A for ATP production, as raw...
essential fatty acids essential amino acids Your diet provides C A for ATP production, as raw materials to build your own molecules, and essential nutrients -- substances you require but cannot make yourself. • The must be obtained from your diet, either by eating meat, eggs, or milk, or by consuming a variety of plant proteins. fuel organic molecules vitamin C B vitamins minerals One of the Jis needed to make membrane phospholipids. Organic nutrients called are required in very...
Look up the exact pKa's of the two ionizable groups for the amino acid methionine. a)...
Look up the exact pKa's of the two ionizable groups for the amino acid methionine. a) fill out a table that gives the charge on each ionizable group and the overall charge on the amino acid for eacu whole pH unit from 0 to 12 b) calculate the isoelectric point of met exactly c) compare your calculated pI from (c) with your table. d) draw the structure of the amino acid at pH 0, 7.4, and 12.
1. The pKa's of the amino acid methionine are 2.28 and 9.21. The zwitterion of methionine is given below (1). S Н,с NH3 (a) Explain why structure (I) is an intermediate ion. Write balanced chemical reactions to support your reasoning (b) Draw the conjugate acid AND conjugate base form of the amino acid shown above (c) A 15-mL aliquot solution consisted 0.25M of the zwitterion of methionine and 0.30M of its conjugate acid was titrated with 0.15M NaOH, calculate the...
Font Ратауар 15. Excess essential amino acids may be stored as: a) proteins. b) glycogen. c) fats. d) a) and (or just) c, depending on the amino acid. e) b) and (or just) c, depending on the amino acid. 16. Some non-essential amino acids are non-essential because they are made in you but only: a) if certain essential amino acids are present in your diet. b) if pyruvate or certain TCA cycle intermediates are present in your diet. c) if...
1. The pKa's of the amino acid methionine are 2.28 and 9.21. The zwitterion of methionine is given below (I) S H3C O NH3 (a) Explain why structure (I) is an intermediate ion. Write balanced chemical reactions to support your reasoning. (b) Draw the conjugate acid AND conjugate base form of the amino acid shown above (c) A 15-mL aliquot solution consisted 0.25M of the zwitterion of methionine and 0.30M of its conjugate acid was titrated with 0.15M N2OH, calculate...
essential fatty acids essential amino acids Your diet provides C A for ATP production, as raw materials to build your own molecules, and essential nutrients -- substances you require but cannot make yourself. • The must be obtained from your diet, either by eating meat, eggs, or milk, or by consuming a variety of plant proteins. fuel organic molecules vitamin C B vitamins minerals One of the Jis needed to make membrane phospholipids. Organic nutrients called are required in very...
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