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(a) Draw the lewis structure for the amino acid valine, showing the amino group and the carboxylic acid group in their un-ionized forms.

(b) Draw the lewis structure for the zwitterionic form of valine 

(c) Which of these structures will be the predominant form at physiological pH?

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Christian Tuso
Christian TusoLv10
25 Nov 2020

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Related questions


From the list of amino acids given, select the pair that will form a hydrophobic interaction between R groups on different protein subunits and classify the level of protein structure. serine, valine, leucine, glutamine, glutamic acid, lysine

options:

a)Serine and valine will form a hydrophobic interaction; quaternary structure.

b)Glutamic acid and glutamine will form a hydrophobic interaction; tertiary structure.

c) Lysine and leucine will form a hydrophobic interaction; secondary structure.

d) Valine and leucine will form a hydrophobic interaction; quaternary structure.

e) None of the above is correct.

9. Calculate the pI for the tripeptide E-R-H and draw itspredominant chemical structure at its pI, including the predominant+ and - charges present. Assume the N-terminal amino group has apKa of 10.0 and the C-terminal carboxylic group a pKa of 3.4.Assume the pKas for the amino acid side chains are as given inTable 4.1 in the Garrett and Grisham text.


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