1. Low, B.: The Structure and configuration, Proteins, Neurath-Bailey, Bd. I A, S. 237.
2. Pauling, L., and R. B. Corey: Fortschr. Chem. org. Naturstoffe 11, 186 (1954).
3. Hms, C. W. H., S. Moore and W. H. Stein: J. biol. Ch. 195, 675 (1952).
4. Vgl. Winters, J. C., and R. Kunjn: Industr. engng. Chem. 41, 460 (1949).
5. Partridge, S. M., and G. Westall: Biochem. J. 44, 418, 513 (1949).