45. Molecular weight analysis of a protein yields the following information: (Guanidinium chloride is a chaotropic (denaturing) reagent and 2-mercaptoethanol can reduce disulfide bonds.)What can you deduce about the protein's quaternary structure? (A) Dimer of 100,000-M.. (B) Each 100,000-M. unit is dimer of a 25,000-M, and 75,000-M, protein jointly covalently by disulfide bonds. (C) Dimer of a 25,000-M, and 75,000-M, protein. (D) Monomer of 200,000-M..