1. Bartelsom (1968)Ann. N. Y. Acad. Sci.,149, 643.
2. Bitter, T. and Muir, H. M. (1962)Anal. Biochem.,4, 330.
3. Chempakam, B. and Kurup, P. A. (1978)Indian J. Biochem. Biophys.,15, 122.
4. Dische, Z. and Shettles, L. B. (1948)J. Biol. Chem.,175, 595.
5. Dische, M., Gilles, K. A., Hamilton, J. K., Robers, P. A. and Smith, P. A., (1956)Method Enzymol,8, 93.