منابع مشابه
Crystalline Enzymes
In this monograph, Northrop summarizes the work on proteolytic enzymes and on the bacteriophage which has been carried out in his laboratory at the Rockefeller Institute for Medical Research in Princeton during the past ten years. After a brief introduction, dealing with the fundamentals of enzymatic catalysis, the preparation in crystalline or purified form and the properties of the following ...
متن کاملCrystalline Ribonuclease
1. A crystalline enzyme capable of digesting yeast nucleic acid has been isolated from fresh beef pancreas. 2. The enzyme called "ribonuclease" is a soluble protein of albumin type. Its molecular weight is about 15,000. Its isoelectric point is in the region of pH 8.0. 3. Ribonuclease splits yeast nucleic acid into fragments small enough to diffuse readily through collodion or cellophane membra...
متن کاملCrystalline Trypsin
A method is described for isolating a crystalline protein of high tryptic activity from beef pancreas. The protein has constant proteolytic activity and optical activity under various conditions and no indication of further fractionation could be obtained. The loss in activity corresponds to the decrease in native protein when the protein is denatured by heat, digested by pepsin, or hydrolyzed ...
متن کاملCrystalline Computation
Discrete lattice systems have had a long and productive history in physics. Examples range from exact theoretical models studied in statistical mechanics to approximate numerical treatments of continuum models. There has, however, been relatively little attention paid to exact lattice models which obey an invertible dynamics: from any state of the dynamical system you can infer the previous sta...
متن کاملCrystalline Papain.
In an earlier study (1) of the amino acid composition of papain, it was assumed that all of the sulfur could be attributed to cysteine and cystine since methionine is absent from this protein. However, because of the sulfhydryl nature of this enzyme, the content of these amino acids is of some importance; we have used the method of Schram, Moore, and Bigwood (2) for this estimation. The results...
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ژورنال
عنوان ژورنال: Nature
سال: 1930
ISSN: 0028-0836,1476-4687
DOI: 10.1038/125090a0