Photodissociation of cytochrome oxidase-nitric oxide at low temperatures.

Photodissociation of cytochrome oxidase-nitric oxide at low temperatures. Research Abstract Details 

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Photodissociation of cytochrome oxidase-nitric oxide at low temperatures. Abstract Text:

S Yoshida,H Hori,Y Orii,

Spectrophotometric studies revealed the irreversible photodissociation of reduced cytochrome oxidase-nitric oxide (NO) at 5 K. The dissociated NO recombined as the sample temperature was raised, and the half-recombination temperature was 65 K. The photodissociation at 5K was also confirmed by a change in the EPR spectrum; that is, ferroheme a-NO signals at gx=2.09 and gm=2.006 were replaced by a new signal at gm=2.03, and this change was reversed at the temperature of liquid nitrogen. Comparison of such behavior with that of cytochrome oxidase-carbon monoxide led us to propose that on photodissociation of NO from heme iron, the NO was trapped specifically at a site near the heme iron producing a new paramagnetic species. Its identification will require further studies.

Photodissociation of cytochrome oxidase-nitric oxide at low temperatures. Publishing Authors By Initials

S Yoshida,H Hori,Y Orii,

For similar investigative techniques: chemistry, analytical: spectrum analysis research abstracts see: investigative techniques: chemistry, analytical: spectrum analysis research

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Photodissociation of cytochrome oxidase-nitric oxide at low temperatures. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Journal of biochemistry

VOLUME: 88

Page Numbers: 1623-7

Journal Abbreviation: J. Biochem.

ISSN: 0021-924X

DAY: 19

MONTH: Dec

YEAR: 1980

Photodissociation of cytochrome oxidase-nitric oxide at low temperatures. Information

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LANGUAGE: eng

NlmUniqueID: 376600

Photodissociation of cytochrome oxidase-nitric oxide at low temperatures. Keywords Mesh Terms:

KEYWORDS: Spectrum Analysis

MESH TERMS: radiation effects

Chemical & Substance for Abstract: Photodissociation of cytochrome oxidase-nitric oxide at low temperatures. Information

Substance Name: Electron Transport Complex IV

Registry Number: EC 1.9.3.1

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Country: JAPAN

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MEDLINETA: J Biochem

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