Question

Which of the following is TRUE about protein conformation.

A. Some proteins are globular, some are fibrous.
B. In globular proteins, hydrophobic parts of amino acid residues tend to occur in the interior of the folded, globular protein.
C. In keratin, disulfide bridges or bonds occur between keratin chains, increasing the strength of the structure formed by keratin.
D. H bonding occurs between amino acid backbone atoms and also between some side chains in the folded globular state.
E. All of the above is true.