10. All of the statements about the tertiary structure of the enzyme triose phosphate isomerase arecorrect EXCEPT:
(A) Its β-strands are parallel.
(B) Its a-helices are in the interior core of the molecular structure.
(C) It contains a β-barrel in the center of its structure.
(D) It is composed entirely of alternating a-helices and B-strands.
(E) Hydrophobic residues are buried between concentric layers.