The tertiary structure of a protein is define as the 3-D structure formed by the polypeptide chain due to the numerous interactions that the sequence can have with itself and its environment including hydrophobic interactions and H-bonding.
Which of the following bonds or interactions is/are possible contributors to the stability of the tertiary structure of a globular protein?
A. Peptide bonds between a metal ion cofactor and a histidine residue
B. Hydrophobic interactions between histidine and tryptophan R groups.
C. Covalent disulfide cross-links between 2 methionine residues.
D. Hydrogen bonds between serine residues and the aqueous surroundings.
E. All of the above contribute.
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