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Hydrogen Peroxide is Scavenged by Ascorbate-specific Peroxidase in Spinach Chloroplasts
Intact spinach chloroplasts scavenge hydrogen peroxide with a peroxidase that uses a photoreductant as the electron donor, but the activity of ruptured chloroplasts is very low [Nakano and Asada… Expand
THE WATER-WATER CYCLE IN CHLOROPLASTS: Scavenging of Active Oxygens and Dissipation of Excess Photons.
- K. Asada
- Medicine, Chemistry
- Annual review of plant physiology and plant…
- 30 May 1999
Photoreduction of dioxygen in photosystem I (PSI) of chloroplasts generates superoxide radicals as the primary product. In intact chloroplasts, the superoxide and the hydrogen peroxide produced via… Expand
Production and Scavenging of Reactive Oxygen Species in Chloroplasts and Their Functions1
- K. Asada
- Medicine, Biology
- Plant Physiology
- 1 June 2006
The reaction centers of PSI and PSII in chloroplast thylakoids are the major generation site of reactive oxygen species (ROS). Photoreduction of oxygen to hydrogen peroxide (H2O2) in PSI was… Expand
Monodehydroascorbate Reductase in Spinach Chloroplasts and Its Participation in Regeneration of Ascorbate for Scavenging Hydrogen Peroxide
- M. A. Hossain, Y. Nakano, K. Asada
- Biology
- 1 April 1984
Ascorbate peroxidase : a hydrogen peroxide-scavenging enzyme in plants
- K. Asada
- Chemistry
- 1 June 1992
Ascorbate peroxidase is a hydrogen peroxide-scavenging enzyme that is specific to plants and algae and is indispensable to protect chloroplasts and other cell constituents from damage by hydrogen… Expand
Ascorbate Peroxidase in Tea Leaves: Occurrence of Two Isozymes and the Differences in Their Enzymatic and Molecular Properties
- Gong-Xiang Chen, K. Asada
- Biology
- 1 October 1989
Two isozymes of ascorbate (AsA) peroxidase were found in tea leaves, and one of them (AsA peroxidase II) was purified to homogeneity, as judged by polyacrylamide gel electrophoresis. AsA peroxidase… Expand
Separate Assays Specific for Ascorbate Peroxidase and Guaiacol Peroxidase and for the Chloroplastic and Cytosolic Isozymes of Ascorbate Peroxidase in Plants
- Katsumi Amako, Gong-Xiang Chen, K. Asada
- Biology
- 1994
Thylakoid-Bound Ascorbate Peroxidase in Spinach Chloroplasts and Photoreduction of Its Primary Oxidation Product Monodehydroascorbate Radicals in Thylakoids
Ascorbate peroxidase, a key enzyme for the scavenging of hydrogen peroxide in chloroplasts, was found in a thylakoid-bound form in spinach chloroplasts at comparable activity to that in the stroma.… Expand
Chloroplasts: formation of active oxygen and its scavenging
- K. Asada
- Biology
- 1984
Publisher Summary In chloroplasts, chlorophyll-photosensitized production of 1 O 2 is an unavoidable reaction. Chloroplast thylakoids univalently photoreduce molecular oxygen producing O 2 - through… Expand