Chapter 4: Q5P (page 95)
Draw the dipeptide Asp-His at pH 7.0
Short Answer
The dipeptide Asp-His at pH 7.0 is as follows –
Chapter 4: Q5P (page 95)
Draw the dipeptide Asp-His at pH 7.0
The dipeptide Asp-His at pH 7.0 is as follows –
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Get started for freeThe bacterially produced antibiotic gramicidin A forms channels in cell membranes that allow the free diffusion of andions, thereby killing the cell. This peptide consists of a sequence ofand-amino acids. The sequence of a segment of five amino acids in gramicidin A is. Complete the Fischer projection below by adding the correct group to each vertical bond
Presumably, the mix of prebiotic compounds on early
earth included both D- and L-amino acids. What are some hypotheses that
attempt to explain why cells build proteins only from the L forms?
Calculate the number of possible pentapeptides that contain one residue each of and .
Determine the net charge of the predominant form of Asp at (a)pH 1.0, (b) pH 3.0, (c)pH 6.0, and (d) pH 11.0.
In some proteins, the side chain of serine appears to undergo ionization. Explain why ionization would be facilitated by the presence of an aspartate residue nearby.
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