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Concept explainers
(a)
Interpretation:
The structure of leucylvalyltryptophan should be drawn, amide bonds should be labelled, N-terminal and C-terminal amino acids should be identified along with the name of peptide by suing three-letter symbols of amino acids.
Concept Introduction:
Proteins are polymeric
They polymerise by peptide linkage to form dipeptide, oligopeptide and polypeptide molecules. Each peptide bond formation is a condensation reaction that occurs with the elimination of water molecule.
(b)
Interpretation:
The structure of phenylalanylserylthreonine should be drawn, amide bonds should be labeled, N-terminal and C-terminal amino acids should be identified along with the name of the peptide by suing three-letter symbols of amino acids.
Concept Introduction:
Proteins are polymeric biomolecules which are formed by the polymerization of amino acids. Amino acids are the organic molecules with
They polymerise by peptide linkage to form dipeptide, oligopeptide and polypeptide molecules. Each peptide bond formation is a condensation reaction that occurs with the elimination of water molecule.
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Chapter 21 Solutions
EBK GENERAL, ORGANIC, & BIOLOGICAL CHEM
- Consider the tripeptide leucylvalyltryptophan. a. Specify its structure using three-letter symbols for the amino acids. b. How many peptide bonds are present within the peptide? c. Which of the amino acid residues has the largest R group? d. Which of the amino acid residues, if any, has a basic side chain?arrow_forward22-91 Which amino acid does not rotate the plane of polarized light?arrow_forwardAt room temperature, amino acids are solids with relatively high decomposition points. Explain why.arrow_forward
- Consider the tripeptide tyrosylleucylisoleucine. a. Specify its structure using three-letter symbols for the amino acids. b. How many peptide bonds are present within the peptide? c. Which of the amino acid residues has the largest R group? d. Which of the amino acid residues, if any, has an acidic side chain?arrow_forward22-21 Explain why an amino acid cannot exist in an un-ionized form at any pH.arrow_forwardWhat characteristics indicate that amino acids exist as zwitterions?arrow_forward
- 22-42 (a) How many atoms of the peptide bond lie in the same plane? (b) Which atoms are they?arrow_forwardIdentify the R group of the side chain in the following amino acids that results in the side-chain classification indicated in parentheses see Table 19.1: a. tyrosine neutral, polar b. glutamate acidic, polar c. methionine neutral, nonpolar d. histidine basic, polar e. cysteine neutral, polar f. valine neutral, nonpolararrow_forwardHow many different primary structures are possible for a four-amino-acid segment of a protein if the segment contains a. two glycine units and two alanine units b. two glycine units, one alanine unit, and one valine unitarrow_forward
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