1. Brown, G. L., Progress in Nucleic Acids, 2, 259 (Academic Press, 1963).
2. Klee, C. B., and Staehelin, M., Biochim. Biophys. Acta, 61, 668 (1962).
3. Luborsky, S. W., and Cantoni, G. L., ibid., 61, 481 (1962).
4. Ornstein, L., Disc Electrophoresis, Part 1, Theory (Distillation Products Industries, preprint, 1961).
5. Davis, B. J., Disc Electrophoresis, Part 2, Material and Methods (Distillation Products Industries, preprint, 1961).