Showing papers in "Biochimica et Biophysica Acta in 1952"

TL;DR: The ultra-violet inactivation of lysozyme has been studied and found to conform to a first order reaction, and the relation of molecular weight to quantum yield, as well as the other findings, are discussed.

TL;DR: The ultraviolet absorption spectra of a number of nucleic acid derivaties (pyrimidines) and related compounds have been measured at various pH values and the variation of the spectra is shown in all cases to be explicable on the basis of ionic dissociation.

TL;DR: Le rapport de the quantite d'enzyme synthetisea la quantite de substance vivante formee dans le meme temps (taux differentiel de synthese) est constant dans des conditions donnees d'induction.

TL;DR: In this paper, the authors studied the reaction between casein and glucose (one molecule per free amino group of the casein) in the "dry" state by determination of free amino-N and measurement of changes in colour.

TL;DR: A decrease in the fluid-retaining ability of fresh homogenized fibres has been detected in the model system of a spinning muscle brei and the labile factor appears to exert its effect by diminishing greatly the ATP-ase activity of the homogenization fibres.

TL;DR: Spectral variation as a function of pH in the high alkaline range is demonstrated and shown to be due to the dissociation of the sugar moeities.

TL;DR: The total P and total N contents of each batch showed sufficiently good agreement to justify pooling, and one or possibly two unknown ninhydrin-reacting substances were present in the cell wall hydrolysate.

TL;DR: The physiological signification of these facts is discussed, with reference to the secretion of thyroxine and the total or nearly total absence of iodotyrosines in the circulating blood, and the eventuality of a recuperation in situ of the iodides liberated by thyroid dehalogenization of these amino acids.

TL;DR: In this article, the authors describe an enzyme which catalyse the phosphorylation du fructose and du sorbose aux depends de l'ATP, mais who is inactif vis-a-vis des aldohexoses and du fructose-6-phosphate.

TL;DR: The isolation of the desoxypentose nucleic acids of three microorganisms, viz.

TL;DR: In this paper, it is shown that le magnesium forme avec l'ATP un ion complexe, qui constituerait le veritable substrat de la reaction.

TL;DR: The data presented seem to indicate that the process in which this enzyme is involved in photosynthesis is linked to a one-quantum reaction.

TL;DR: Estimations of the adsorption of “MCPA” to monolayers of a protein, lipoid, lipoprotein and finally tomonolayers produced directly from plant tissuee lend support to the suggestion that the foundation of species susceptibility may be based upon the extent of its adsor adaptation to sites not concerned in the physiological response.

TL;DR: In this paper, it was shown that α-carboxylase catalyzes the synthesis of acetylmethylcarbinol (AMC) from pyruvate and acetaldehyde and from acetaldehyde alone.

TL;DR: The onset of rigor mortis in baleen whale muscle has been investigated and a temporary, though sometimes prolonged, arrest of lactic acid formation may precede the physical change.

TL;DR: Three alternative theories involving a second step besides collision in the mechanism of bacteriophage adsorption are proposed and discussed to account for the experimental observations.

TL;DR: The different antimitotic activities of the unsaturated imide/glutathione mixture have found no satisfactory explanation, since the spectrophotometric investigation of the equilibrium mixtures, derived from the interaction at M/50 and M/1000, gave no conclusive results.

TL;DR: It is concluded that the same enzyme is responsible for the activity of both preparations, although slight differences exist between the properties of the ATPase associated with ths granules and the Kielley-Meyerhof enzyme preparation.

TL;DR: Evidence is presented which identifies the product of yeast ribokinase action (ribose + ATP) as ribose-5-phosphate, and the product formed by muscle extract is a 2-ketopentose- 5-ph phosphate.

TL;DR: Bacteriophage precursors have been studied by breaking open infected bacterial cells and examining the intracellular material under the electron microscope by means of explosive decompression, a technique which will break both infected and uninfected bacteria but will not affect free virus particles.

TL;DR: The wall structure of the growth zone of Phycomyces has been further investigated by means of X-rays, the polarizing microscope, and the electron microscope and it has been established that the flat spiral structure which occurs in the growth Zone is sinistral.

TL;DR: Under the experimental conditions of this work, it was not possible to recombine the alkaline-split HRP, and the relation between pH and rate of HCl-splitting was computed.

TL;DR: The reaction of the polylysine hydrochloride, under conditions where browning occurs, is accompanied by a significant increase of molecular weight, and insolubility subsequently develops.

TL;DR: Conalbumin was found to consist of a single peptide chain, the terminal amino group pertaining to alanine, whereas Avidin, whether in form of the glycoprotein or one of its complexes, seemed to be made up of three peptide chains, terminating inAlanine.