Article Abstract:
Deuterium labelling experiments prove that marine cyanobacterium Oscillatoria sp. can oxidize naphthalene to 1-naphthol. Experts currently believe that only fungi and mammals possess the enzymes necessary for 1-naphthol production. However, studies using tagged deuterium show that photoautotrophically grown Oscillatoria strains can incorporate oxygen into thearomatic ring to form naphthalene 1,2-oxide. This is then oxidized to 1-naphthol by an NIH shift mechanism identical to that present in fungi and mammals.
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Article Abstract:
The cryIVD gene of Bacillus thuringiensis was introduced into the cyanobacterium Agmenellum quadruplicatum PR-6 by translational fusion with the PR-6 phycocyaninB gene on a biphasic plasmid. The ligated product was transformed into the cyanobacterium, and found to express the cryIVD gene product at a high level. Larvicidal assays on the mosquito Culex pipiens showed that within six days, all larvae that had ingested the altered cynobacterium were dead.
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Article Abstract:
The major metabolites formed from the oxidation of phenanthrene by Agmenellum quadruplicatum were isolated and identified. Metabolic studies show that A. quadruplicatum cells metabolized phenanthrene to produce phenanthrene trans-9,10-dihydrodiol and 1-methoxyphenanthrene. In addition, small amounts of phenanthrols were also formed. A diagram outlining the postulated pathway for phenanthrene metabolism is presented.
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