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D-Glucose oxidase

The nitrous acid deamination of 2-amino-2-deoxy-D-mannose (8), in the favored conformation, the amino group ofwhich is axially attached, leads, in contrast, uniquely to D-glucose,15 characterized, after oxidation by nitric acid, as D-glucaric acid (9). This result has also been verified by direct crystallization of the D-glucose and by assay with D-glucose oxidase.44"... [Pg.187]

In spite of its importance and popularity, the fine details of the P-D-glucose oxidase mechanism are not completely known. The proposed model (Fig. 2.14) includes both the catalase cascade and the protonation equilibria (Caras et al., 1985b). The pH-dependent reaction term corresponding to this model is quite complex. [Pg.40]

Fig. 3.—Distribution of Carbohydrate and Protein Components in a Preparation of Fungal D-Glucose Oxidase in Fractions from Curtain Electrophoresis.6... Fig. 3.—Distribution of Carbohydrate and Protein Components in a Preparation of Fungal D-Glucose Oxidase in Fractions from Curtain Electrophoresis.6...
Fig. 4.—Ultracentrifugation in sucrose-density gradients Se = immune serum Ab = antibody Glc-Ox = D-glucose oxidase. (Reprinted from Carbohydrate Research, Volume 124, J. H. Pazur, M. S. Erikson, M. Tay, and P. Z. Allen, pp. 253-263, copyright 1983, with permission from Elsevier Science Ltd., The Boulevard, Langford Lane, Kidlington 0X5 1GB, UK.)... Fig. 4.—Ultracentrifugation in sucrose-density gradients Se = immune serum Ab = antibody Glc-Ox = D-glucose oxidase. (Reprinted from Carbohydrate Research, Volume 124, J. H. Pazur, M. S. Erikson, M. Tay, and P. Z. Allen, pp. 253-263, copyright 1983, with permission from Elsevier Science Ltd., The Boulevard, Langford Lane, Kidlington 0X5 1GB, UK.)...
Yeasts, via oxidases acting as dehydrogenases (D-glucose oxidase), produce substantial fluxes of HOOH. In order to "harvest" the redox energy of this intermediate, these organisms have a heme protein (cytochrome-c peroxidase) to facilitate the electron-transfer oxidation of two cytochrome c-[Fe(II)] molecules... [Pg.114]

At equilibrium, the ratio of maltose to D-glucose is 0.52. By use of substrates labeled with carbon-14, it was diown that the reducing group of the maltose molecule is liberated as free D-glucose, and the nonreducing residue is transferred to the donor substrate. In the presence of D-glucose oxidase, equilibrium is not established, and polysaccharide which is stained blue by iodine is synthesized. Amylomaltase thus superficially resembles D-enzyme, although it must be emphasized that maltose is not a substrate for D-enzyme, which transfers two or more hexose residues at a time. [Pg.384]

Keston305-307 showed that the kidney, liver, and lens tissues of many animals contain an enzyme that catalyzes the mutarotation of a- and /3-D-glucose and other sugars it was called mutarotase.3 8,309 This, or a similar, enzyme had earlier been found in preparations of D-glucose oxidase from Penicillium notatum by Bentley and Neu-berger310 and Keilin and Hartree.309 The enzyme was extensively purified by Bentley and Bhate.140 The enzyme is also widely distributed in plant tissues.311... [Pg.63]

Tsuchida T and Yoda K 1981 Immobilization of D-glucose oxidase onto a hydrogen... [Pg.453]

Romette, J. L., Froment, B., Thomas, D., Glucose Oxidase Electrode. Measurements of Glucose in Samples Exhibiting High Variability in Oxygen Content , Clin. Chim. Acta 95 (1979) 249-253. [Pg.107]

The total carbohydrate content of rat liver has been determined in a single-step procedure using glucoamylase and D-glucose oxidase. This is a modification of an earlier two-step system for the measurement of rat-liver glycogen. [Pg.241]

Immobilized D-glucose oxidase has been used for the determination of serum samples containing D-glucose in a commercially available continuous flow analyser.The method appears to be a convenient and economical alternative to the use of soluble enzyme reagents. The D-glucose oxidase-4-aminophenazone-phenol procedure for the determination of D-glucose has been evaluated for use in an autoanalyser.The method compared well with two other available routine methods using the same autoanalyser. [Pg.242]

Detergents have been incorporated into the reagents of the D-glucose oxidase assay to prevent their precipitations when used in the polarographic determination of D-glucose. ... [Pg.242]

D-Glucose oxidase and peroxidase, when adsorbed on to concanavalin A-Sepharose or to Lens culinaris lectin-Sepharose have been used in an analytical system for the estimation of D-glucose. ... [Pg.243]

An enzyme thermistor containing co-immobilized D-glucose oxidase and catalase has been used for the measurement of D-glucose in the outflow from a column reactor containing immobilized j3-D-galactosidase acting on a solution of lactose. [Pg.243]

D-Glucose oxidase has been immobilized on porous glass and the product used in column form for the determination of D-glucose. The liberated hydrogen peroxide was determined colorimetrically with peroxidase and a hydrogen acceptor. [Pg.243]

D-Glucose Oxidases. — Preliminary investigations have indicated that D-glucose 6-sulphate and D-glucose 1-sulphate are neither substrates nor inhibitors of D-glucose oxidase. ... [Pg.532]

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See also in sourсe #XX -- [ Pg.231 ]



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