1. 32. Mitt.; 31. Mitt. sieheH. Erlenmeyer undRey-Bellet, Helv.38 (1955).
2. O. Warburg,Schwermetalle als Wirkungsgruppen von Fermenten (Dr. W. Sänger, Berlin 1946).
3. E. L. Smith,Aspects of the Specificity and mode of action of some Peptidases. Enzymes and Enzyme Systems (Harvard University Press, Cambridge 1951), p. 49.
4. I. M. Klotz,Thermodynamic and Molecular Properties of some Metal Protein Complexes, A Symposium on the Mechanism of Enzyme Action (The John Hopkins Press, Baltimore 1954), p. 257.
5. S. Fallab, Exper.10, 190 (1954).