Oxidation of Octopus vulgaris hemocyanin by nitrogen oxides
Journal Article
·
· Biochemistry; (United States)
The reaction of Octopus vulgaris hemocyanin with nitrite was studied under a variety of conditions in which the green half-met derivative is formed. Analytical evidence shows that the amount of chemically detectable nitrite in various samples of the derivative is not proportional to the cupric copper detected by EPR. The kinetics of oxidation of hemocyanin as a function of protein concentration and pH, in the presence of nitrite and ascorbate, is consistent with a scheme in which NO/sub 2/ is the reactive oxidant. We suggest that the green half-methemocyanin contains a metal center with one cuprous and one cupric copper without an exogenous nitrogen oxide ligand.
- Research Organization:
- Univ. of Padova (Italy)
- OSTI ID:
- 5900582
- Journal Information:
- Biochemistry; (United States), Journal Name: Biochemistry; (United States) Vol. 28:2; ISSN BICHA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
560300* -- Chemicals Metabolism & Toxicology
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ANIMALS
AQUATIC ORGANISMS
BIOCHEMICAL REACTION KINETICS
BIOLOGICAL EFFECTS
CHALCOGENIDES
ELECTRON SPIN RESONANCE
HEMOCYANIN
INVERTEBRATES
KINETICS
LIGANDS
MAGNETIC RESONANCE
METABOLISM
METALLOPROTEINS
MOLLUSCS
NITRITES
NITROGEN COMPOUNDS
NITROGEN OXIDES
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PROTEINS
REACTION KINETICS
RESONANCE
SPECTROPHOTOMETRY
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ANIMALS
AQUATIC ORGANISMS
BIOCHEMICAL REACTION KINETICS
BIOLOGICAL EFFECTS
CHALCOGENIDES
ELECTRON SPIN RESONANCE
HEMOCYANIN
INVERTEBRATES
KINETICS
LIGANDS
MAGNETIC RESONANCE
METABOLISM
METALLOPROTEINS
MOLLUSCS
NITRITES
NITROGEN COMPOUNDS
NITROGEN OXIDES
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PROTEINS
REACTION KINETICS
RESONANCE
SPECTROPHOTOMETRY