6. An allosteric interaction between a ligand and a protein is one in which: (A) two different ligands can bind to the same binding site. (B) the binding of a molecule to a binding site affects the binding properties of another site on the protein. (C) the binding of the ligand to the protein is covalent. (D) multiple molecules of the same ligand can bind to the same binding site. (E) the binding of a molecule to a binding site affects the binding of an additional molecule to the same site.