Chemistry
Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Concept explainers

Neutral Amino Acids
Amino acids which do not have any charge on them are neutral amino acids.
Globular Protein
The globular proteins refer to the shape of protein specifically spherical in nature apart from spherical form fibrous, disordered and membrane-bound proteins exist. These globular proteins are miscible in water and form a colloidal solution rather than …
Dimer
Dimers are basic organic compounds, which are derivates of oligomers. It is formed by the combination of two monomers which could potentially be strong or weak and in most cases covalent or intermolecular in nature. Identical monomers are called homodime…
Dipeptide
A dipeptide is considered a mixture of two distinct amino acids. Since the amino acids are distinct, based on their composition, two dipeptide's isomers can be produced. Various dipeptides are biologically essential and are therefore crucial to industry.
Question

Consider the peptide Trp-Arg-Glu-Cys-Gly-Tyr. For the drawings requested below,  please show them in zig-zag style, from amino to carboxy terminus, with correct  stereochemistry

please highlight the part has been change

  1. Draw the predominant form at pH = 2 
  2. Draw the predominant form at pH = 5 
  3. Draw the predominant form at pH = 7 
  4. Draw the predominant form at pH = 12  
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Step 1: The peptide Trp-Arg-Glu-Cys-Gly-Tyr in neutral form
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Step 2: Structure at pH = 2
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Step 3: Structure at pH = 5
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Step 4: Structure at pH = 7
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Step 5: Structure at pH = 12
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