Results 221 to 230 of about 150,558 (259)

Ascorbate Peroxidase in Malted Barley

Journal of the American Society of Brewing Chemists, 2013
An ascorbate peroxidase has been identified in the acrospire and aleurone of germinating barley. Its synthesis is triggered in the aleurone by the presence of ascorbic acid and hydrogen peroxide.
Makoto Kanauchi, Charles W. Bamforth
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Effectiveness of ascorbate and ascorbate peroxidase in promoting nitrogen fixation in model systems

Phytochemistry, 1999
Ascorbate and ascorbate peroxidase are important antioxidants that are abundant in N2-fixing legume root nodules. Antioxidants are especially critical in root nodules because leghemoglobin, which is present at high concentrations in nodules, is prone to autoxidation and production of activated oxygen species such as O2.- and H2O2.
E J, Ross, S B, Kramer, D A, Dalton
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Peroxidase-Catalyzed Oxidation of Ascorbate Structural, Spectroscopic and Mechanistic Correlations in Ascorbate Peroxidase

2000
Ascorbate-dependent peroxidase activity was first reported in 1979 (Groden and Beck, 1979; Kelly and Latzko, 1979) and ascorbate peroxidase (APX) is, therefore, a relative newcomer to the peroxidase field--horseradish (HRP) and cytochrome c (CcP) peroxidases were, for example, first identified in 1903 (Bach and Chodat, 1903) and 1940 (Altschul et al ...
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Catalytic Oxidation of p-Cresol by Ascorbate Peroxidase

Archives of Biochemistry and Biophysics, 2000
Transient and steady state kinetics, together with a range of chromatographic and spectroscopic techniques, have been used to establish the mechanism and the products of the H(2)O(2)-dependent oxidation of p-cresol by ascorbate peroxidase (APX). HPLC, GC-MS, and NMR analyses are consistent with the formation of 2, 2'-dihydroxy-5,5'-dimethylbiphenyl (II)
Celik, A, Cullis, PM, Lloyd Raven E
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Enhanced axial symmetry at the Fe3+-heme center of peroxidase by ascorbate: A basis for the ascorbate-dependent peroxidase action

Biochemical and Biophysical Research Communications, 1991
In the absence of its substrate hydrogen peroxide, peroxidase exhibits perturbations in its Fe(3+)-heme center, when incubated with ascorbic acid. The electron paramagnetic pattern sprang towards a higher g-value side, denoting a sharpening of the rhombic axial symmetry around the heme-center.
G, Pradeep Kumar, S, Sinha, M, Laloraya, M, Nivsarkar   +3 more
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Purification and characterization of ascorbate peroxidase in Chlorella vulgaris

Biochimie, 1998
Chlorella vulgaris contained only one isoform of ascorbate peroxidase (AsAP) as the hydrogen peroxide (H2O2)-scavenging system except for catalase at a specific activity of 3.3 +/- 0.2 units/mg protein. The activity of glutathione peroxidase was not detected in the extracts from cells grown in the absence and presence of sodium selenite.
T, Takeda, K, Yoshimura, T, Ishikawa, S, Shigeoka   +3 more
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Distribution of cytosolic ascorbate peroxidase in Angiosperms

Giornale botanico italiano, 1996
Abstract Over 80 Angiosperms have been screened for cytosolic ascorbate peroxidase by means of native-polyacrylamide gel electrophoresis techniques. The results of our analysis show that the presence of a single cytosolic ascorbate peroxidase form is the most common case in the Angiosperms investigated when seedlings or young tissues are analized. This
PACIOLLA, Costantino, De Gara L, DE TULLIO, Mario, Arrigoni O.   +3 more
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Physiological function and regulation of ascorbate peroxidase isoforms

Journal of Experimental Botany
AbstractAscorbate peroxidase (APX) reduces H2O2 to H2O by utilizing ascorbate as a specific electron donor and constitutes the ascorbate–glutathione cycle in organelles of plants including chloroplasts, cytosol, mitochondria, and peroxisomes. It has been almost 40 years since APX was discovered as an important plant-specific H2O2-scavenging enzyme ...
Kazuya Yoshimura, Takahiro Ishikawa
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L-Ascorbate peroxidase

1994
D. Schomburg, M. Salzmann, D. Stephan
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Ascorbate Peroxidase Isozymes in Gymnosperms

Giornale botanico italiano, 1994
TOMMASI, Franca, Arrigoni O., PACIOLLA, Costantino   +2 more
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