Relative Distribution of Enzymes and Prosthetic Groups

Abstract

THE Enzyme Classification¹, published in 1961, is a convenient source of authoritative data on the numbers and types of enzymes. The recently revised version of the list² has extended the available data and made possible an assessment of the changes produced by 5 years of increasingly fruitful work in the field of enzymology. The figures quoted in this communication are based on my own examination of the two editions of the Enzyme Classification. In spite of any numerical errors which may have resulted, I think that the findings are quite clear and of general interest.