Introduction to General, Organic and Biochemistry
11th Edition
ISBN: 9781285869759
Author: Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres
Publisher: Cengage Learning
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Chapter 22, Problem 22.17P
22-17 What are the similarities and differences in the structures of alanine and phenylalanine?
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- 22-20 Show how alanine, in solution at its isoelectric point, acts as a buffer (write equations to show why the pH does not change much if we add an acid or a base).arrow_forward22-64 If both cysteine residues on the B chain of insulin were changed to alanine residues, how would it affect the quaternary structure of insulin?arrow_forward22-92 Write the expected products of the acid hydrolysis of the following tetrapeptide:arrow_forward
- 22-48 How many amino acid residues in the A chain of insulin are the same in insulin from humans, cattle (bovine), hogs, and sheep?arrow_forward22-21 Explain why an amino acid cannot exist in an un-ionized form at any pH.arrow_forward22-46 How many different tripeptides can be made (a) using one, two, or three residues each of leucine, threonine, and valine and (b) using all 20 amino acids?arrow_forward
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