1. Muus, J., C.R. Lab. Carlsberg, Ser. Chim., 28, 317 (1953).
2. Ornstein, L., and Davis, B. J., Disc. Electrophoresis (distributed by Distillation Products Industries, 1961).
3. Johnson, P. E., Master's thesis, Mount Holyoke College (1950).
4. Millin, D. J., and Smith, M. H., Biochim. Biophys. Acta, 62, 450 (1962).
5. Patton, J. R., and Pigman, W., Science, 125, 1292 (1957); J. Amer. Chem. Soc., 81, 3035 (1959).