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1994•FEMS Microbiology LettersOpen access

A denitrifying strain of Rhodobacter capsulatus

D Richardson

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Abstract

Repeated subculturing of Rhodobacter capsulatus strain BK5 under phototrophic conditions on a medium containing butyrate and nitrate led to the appearance of cultures that, unlike the original, produced gas. Isolation of a pure culture of the gas-forming organism revealed that it was a derivative of R. capsulatus BK5 that by virtue of expressing a nitrite reductase can catalyse the complete sequence of the denitrification reactions. The nitrite reductase is of the type that contains copper rather than haem.

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Repeated subculturing of Rhodobacter capsulatus strain BK5 under phototrophic conditions on a medium containing butyrate and nitrate led to the appearance of cultures that, unlike the original, produced gas. Isolation of a pure culture of the gas-forming organism revealed that it was a derivative of R. capsulatus BK5 that by virtue of expressing a nitrite reductase can catalyse the complete sequence of the denitrification reactions. The nitrite reductase is of the type that contains copper rather than haem.

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Available abstract

Repeated subculturing of Rhodobacter capsulatus strain BK5 under phototrophic conditions on a medium containing butyrate and nitrate led to the appearance of cultures that, unlike the original, produced gas. Isolation of a pure culture of the gas-forming organism revealed that it was a derivative of R. capsulatus BK5 that by virtue of expressing a nitrite reductase can catalyse the complete sequence of the denitrification reactions. The nitrite reductase is of the type that contains copper rather than haem.

Key concepts: Rhodobacter, Nitrite reductase, Denitrifying bacteria, Rhodospirillales, Rhodospirillaceae, Strain (injury), Denitrification, Biochemistry

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