What type of interaction would you expect between the side chains of each of the

Question

What type of interaction would you expect between the side chains of each of the following pairs of amino acids in the tertiary structure of a protein? histidine and aspartate alanine and valine two cysteines serine and asparagine State whether each of the following statements describe primary, secondary, tertiary, or quaternary structure of a protein. Side chains interact to form disulfide bonds. Peptide bonds join amino acids in a polypeptide chain. Two polypeptide chains are held together by hydrogen bonds. Hydrogen bonding between amino acids in the same polypeptide gives a coiled shape to the protein. Myoglobin is a protein containing 153 amino acids. Approximately half of the amino acids in myoglobin have polar side chains. where would you expect these amino acid side chains to be located in the tertiary structure of the protein? Where would you expect the nonpolar side chains to be? Would you expect myoglobin to be more or less soluble in water than a protein composed primarily of nonpolar amino acids? Why?

Explanation / Answer

1.

a. Ion-pair and charged hydrogen-bond interactions

b. hydrophobic interaction and disulfide bonds

c. hydrophobic interactions

d. hydrogen-bond interactions

2.

a. Tertiary

b. Primary

c. Quaternary

d. Secondary

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