Concept explainers
a.
To identify:
The N and C terminus of the given peptides. Phe-Glu.
Introduction:
The condensation reaction between the N-terminal of one amino acid and carboxylic group of another amino acid leads to the formation of a peptide bond. According to the convention, N-terminal of amino acid in a peptide bond is written on the left hand side while the C-terminal of amino acids is written on the right hand side.
The N-terminus represents the starting of the polypeptide which refers the free amino group and the C-terminus represents the end of the polypeptide which refers the free carboxyl group.
b.
To identify:
The N and C terminus of the given peptides KCG.
Introduction:
The condensation reaction between the N-terminal of one amino acid and carboxylic group of another amino acid leads to the formation of a peptide bond. According to the convention, N-terminal of amino acid in a peptide bond is written on the left hand side while the C-terminal of amino acids is written on the right hand side.
The N-terminus represents the starting of the polypeptide which refers the free amino group and the C-terminus represents the end of the polypeptide which refers the free carboxyl group.
c.
To identify:
The structural formula for the given peptide His-Met-Gln.
Introduction:
The condensation reaction between the N-terminal of one amino acid and carboxylic group of another amino acid leads to the formation of a peptide bond. According to the convention, N-terminal of amino acid in a peptide bond is written on the left hand side while the C-terminal of amino acids is written on the right hand side.
The N-terminus represents the starting of the polypeptide which refers the free amino group and the C-terminus represents the end of the polypeptide which refers the free carboxyl group.
d.
To determine:
The structural formula for the given peptide WY.
Introduction:
The condensation reaction between the N-terminal of one amino acid and carboxylic group of another amino acid leads to the formation of a peptide bond. According to the convention, N-terminal of amino acid in a peptide bond is written on the left hand side while the C-terminal of amino acids is written on the right hand side.
The N-terminus represents the starting of the polypeptide which refers the free amino group and the C-terminus represents the end of the polypeptide which refers the free carboxyl group.
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General, Organic, and Biological Chemistry (3rd Edition)
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