試題詳解

2. Tertiary structure is defined as:
(A) the folding of a single polypeptide chain in three-dimensional space,
(B) the sequence of amino acids,
(C) hydrogen bonding interactions between adjacent amino acid residues into helical or pleated segments,
(D) the way in which separate folded monomeric protein subunits associate to form oligomeric proteins,
(E) all are true.