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b) Show the dipeptide formed by the following two amino acids: + H₂N-CH-Coo- H₂N-CH-COo + +...
19) The form of dipeptide aspatylserine (Asp-Ser) obtained from two amino acids, aspartic acid an...
19) The form of dipeptide aspatylserine (Asp-Ser) obtained from two amino acids, aspartic acid and serine, whose structures are shown here, is HiN-CH-C-0HIN-CH-C-0 CH2 CH OH aspartic acid serine A HN-CH-C-o-N-CH-C-o CH OH CH2 coo -(H-C-o-H-c-o CH OH CH2 HIN CH-C-N-CH-C-O CH OH CH H-CH-CH CH CH OH coo- 20) Where is the peptide bond located in this dipeptide? serine valine a) the CO-NH joining serine and the valine b) the doubly bonded oxygen just left of center between the...
14) Which of the following amino acids will by cation-exchange chromatography? following amino acids will be...
14) Which of the following amino acids will by cation-exchange chromatography? following amino acids will be retained longest in the column when sepa Η serne HO-CH-C-COO v. Lysine H3N-CH2CH2CH2CH2CH-co NES NH V. Phenylalanine CH-C–COOH II. Alanine CH3-C-Coo II. Cysteine HS-CH-c-coo® NE 15) What is the product obtained from mild oxidation of the thiol shown below? mild 2R-SH oxidation A) R-S- R B) R-OH C) R-S-S-R DR-OO- RE ) R-S-OH 16) Which bond in the following compound is a peptide bond?...
4. Write out the 10 structure for the following polypeptide: он он HyN-CH-C-N-CH-C-N-CH-COO CH2 CH-OH CH...
4. Write out the 10 structure for the following polypeptide: он он HyN-CH-C-N-CH-C-N-CH-COO CH2 CH-OH CH C-NH2 CH3 COO 5. Illustrate the possible 2° structure interactions in the following polypeptide: R. 6. Identify the type of 3° structure interaction that will occur between the following pairs of amino acids: a) Aspartic acid and lysine b) Serine and tyrosine c) Leucine and valine d) Cysteine and cysteine 7. Draw out the products of the hydrolysis of the following polypeptide: HsN CH-C-N-C-C-N-C-C-N-CH-C-N-CH-COo...
Which of the following amino acids will be retained longest in the column when separated by...
Which of the following amino acids will be retained longest in the column when separated by cation-exchange chromatography? H 1. Serine HO-CH2-C-COO® IV. Lysine NH H3N-CH2CH2CH2CH2CH -COOH NH H H V. Phenylalanine -CH--COOH NH II. Alatine Chy-d-coop H II. Cysteine HS-CH -¢-Coo® NH О О О О О IV V
The primary structure of a protein is formed by the condensation of amino acids in a...
The primary structure of a protein is formed by the condensation of amino acids in a certain sequence. Consider the dipeptide formed by the condensation of glycine and tyrosine in Figure 8.31B. a. Draw the structure of the dipeptide that would be formed if the two amino acids condensed in the opposite sequence. b. How are the structures of the dipeptides in Figure 8.31B and your drawing related to each other? B 0 HN-C-0--OH HO H-N-C-C-OH H CHE H OH...
1. Identify the amino acids in the following tripeptide and provide the major structure of the...
1. Identify the amino acids in the following tripeptide and provide the major structure of the tripeptide at pH 3, 7, 12. H O ?? ?? 2a. Ideally, one could synthesize a peptide without the use of protecting groups In the following problem, provide a mechanism for the synthesis of the dipeptide Phe-Trp. Assume that the only product formed is Phe-Trp. N-C-N Ph (DCC) OH Phe-Trp
On paper draw a dipeptide, clearly showing the peptide bond joining the two amino acids together....
On paper draw a dipeptide, clearly showing the peptide bond joining the two amino acids together. If the two amino acids are valine and threonine, predict the overall charge of the dipeptide at pH 7. Do not forget to consider the amino (N-terminal) and carboxy (C-terminal) of the dipeptide, as well as the R groups. Select one: a. +2 b. -2 c. 0 d. -1 e. +1
Choose the amino acids from the list below that could combine to give the following dipeptide....
Choose the amino acids from the list below that could combine to give the following dipeptide. H2-CH- CH-C -OH H CH2 H N—C—C—OH CH2 H N—C—C- -OH CH2 CH2 CH2 CH2 NH2 H2N-CH-C-OH CH2 OH H2N-CH- -C- -OH Н. OO H2N-CH-C-OH CH-CH, сн.
Amino Acids SW C2 9. Which of the following is an L-amino acid? çoo coo coo...
Amino Acids SW C2 9. Which of the following is an L-amino acid? çoo coo coo HẠN |-R HANH, HẠN –H HÀNH R coo B. 10. The following questions refer to the structures A-E below: (a) Which represents the structure of an amino acid at very high pH? (b) Which is a zwitterion? (c) Which represents the structure of an amino acid at very low pH? (d) Which structure/(s) is/are) not possible? R-CH-COOR-CH-COOH R-CH-COOH R-CH-COOR -CH-COO NH2 NH2 *NH NH2...
1) Which of the following is an amino acid? A) e R-CH-CH2-C00R -CH-CooR -CH-C-CO ile R-CH-C-NH3...
1) Which of the following is an amino acid? A) e R-CH-CH2-C00R -CH-CooR -CH-C-CO ile R-CH-C-NH3 R-C=CH-Coo NH3 NH3 NH3 ONH 3 D) coo B) E) 2) Which of the following amino acids has a sulfur in the R group? A) serine B) cysteine C) asparagine D) tyrosine E) leucine 3) Which of the following terms describes the side chain of valine? A) acidic B) basic C) charged, polar D) uncharged, polar E) nonpolar 4) Which of the following is...
19) The form of dipeptide aspatylserine (Asp-Ser) obtained from two amino acids, aspartic acid and serine, whose structures are shown here, is HiN-CH-C-0HIN-CH-C-0 CH2 CH OH aspartic acid serine A HN-CH-C-o-N-CH-C-o CH OH CH2 coo -(H-C-o-H-c-o CH OH CH2 HIN CH-C-N-CH-C-O CH OH CH H-CH-CH CH CH OH coo- 20) Where is the peptide bond located in this dipeptide? serine valine a) the CO-NH joining serine and the valine b) the doubly bonded oxygen just left of center between the...
14) Which of the following amino acids will by cation-exchange chromatography? following amino acids will be retained longest in the column when sepa Η serne HO-CH-C-COO v. Lysine H3N-CH2CH2CH2CH2CH-co NES NH V. Phenylalanine CH-C–COOH II. Alanine CH3-C-Coo II. Cysteine HS-CH-c-coo® NE 15) What is the product obtained from mild oxidation of the thiol shown below? mild 2R-SH oxidation A) R-S- R B) R-OH C) R-S-S-R DR-OO- RE ) R-S-OH 16) Which bond in the following compound is a peptide bond?...
4. Write out the 10 structure for the following polypeptide: он он HyN-CH-C-N-CH-C-N-CH-COO CH2 CH-OH CH C-NH2 CH3 COO 5. Illustrate the possible 2° structure interactions in the following polypeptide: R. 6. Identify the type of 3° structure interaction that will occur between the following pairs of amino acids: a) Aspartic acid and lysine b) Serine and tyrosine c) Leucine and valine d) Cysteine and cysteine 7. Draw out the products of the hydrolysis of the following polypeptide: HsN CH-C-N-C-C-N-C-C-N-CH-C-N-CH-COo...
Which of the following amino acids will be retained longest in the column when separated by cation-exchange chromatography? H 1. Serine HO-CH2-C-COO® IV. Lysine NH H3N-CH2CH2CH2CH2CH -COOH NH H H V. Phenylalanine -CH--COOH NH II. Alatine Chy-d-coop H II. Cysteine HS-CH -¢-Coo® NH О О О О О IV V
The primary structure of a protein is formed by the condensation of amino acids in a certain sequence. Consider the dipeptide formed by the condensation of glycine and tyrosine in Figure 8.31B. a. Draw the structure of the dipeptide that would be formed if the two amino acids condensed in the opposite sequence. b. How are the structures of the dipeptides in Figure 8.31B and your drawing related to each other? B 0 HN-C-0--OH HO H-N-C-C-OH H CHE H OH...
1. Identify the amino acids in the following tripeptide and provide the major structure of the tripeptide at pH 3, 7, 12. H O ?? ?? 2a. Ideally, one could synthesize a peptide without the use of protecting groups In the following problem, provide a mechanism for the synthesis of the dipeptide Phe-Trp. Assume that the only product formed is Phe-Trp. N-C-N Ph (DCC) OH Phe-Trp
Choose the amino acids from the list below that could combine to give the following dipeptide. H2-CH- CH-C -OH H CH2 H N—C—C—OH CH2 H N—C—C- -OH CH2 CH2 CH2 CH2 NH2 H2N-CH-C-OH CH2 OH H2N-CH- -C- -OH Н. OO H2N-CH-C-OH CH-CH, сн.
Amino Acids SW C2 9. Which of the following is an L-amino acid? çoo coo coo HẠN |-R HANH, HẠN –H HÀNH R coo B. 10. The following questions refer to the structures A-E below: (a) Which represents the structure of an amino acid at very high pH? (b) Which is a zwitterion? (c) Which represents the structure of an amino acid at very low pH? (d) Which structure/(s) is/are) not possible? R-CH-COOR-CH-COOH R-CH-COOH R-CH-COOR -CH-COO NH2 NH2 *NH NH2...
1) Which of the following is an amino acid? A) e R-CH-CH2-C00R -CH-CooR -CH-C-CO ile R-CH-C-NH3 R-C=CH-Coo NH3 NH3 NH3 ONH 3 D) coo B) E) 2) Which of the following amino acids has a sulfur in the R group? A) serine B) cysteine C) asparagine D) tyrosine E) leucine 3) Which of the following terms describes the side chain of valine? A) acidic B) basic C) charged, polar D) uncharged, polar E) nonpolar 4) Which of the following is...
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