複選題38. SDS-PAGE is a method in which proteins coated with negatively charged detergent SDS are separated along a gel matrix in the presence of an electric field. The method separates proteins based on relative molecular weights of proteins. Which of the following statements about SDS-PAGE is TRUE? (A) Larger proteins bind more negatively charged SDS and run faster (B) Larger proteins run slower because they are heavier (C) Larger proteins run slower because they face a greater resistance (D) Proteins run from anode to cathode (E) Larger proteins separate better in a higher percentage SDS-PAGE gel