1. E. Layne, “Method in Enzymology,” Vol. III, ed. by S. P. Colowick and N. O. Kaplan, Academic Press Inc., New York, 1957, p. 448.
2. K. Narita, “Protein Sequence Determination,” ed. by S. B. Needleman, Springar-Verlag Berlin, Heidelberg, New York, 1970, p. 27.