A Riboflavin-producing Bacterium

trans-aconitate metabolism in a riboflavin producing

Vitamin B12-producing Bacterium

Extensive research on the formation of methionine has implicated vitamin B12 as a cofactor in the final reaction of the biosynthetic sequence. Since plants and fungi do not produce or require B12, an alternate reaction must also exist. It is thus not surprising that Escherichia coli has been found to possess two mechanisms for the methylation of homocysteine to methionine (9). These reactions a...

Haemophilus ducreyi, a cytotoxin-producing bacterium.

An extra- and an intracellular product from the bacterium Haemophilus ducreyi were shown to have a cytotoxic effect on cell lines of epithelial origin, e.g., HEp-2 and HeLa cells. The cytotoxic effect appeared on cells within 24 h and resulted in cell death and morphologically changed cells. The cytotoxic activity was heat and pronase sensitive. The activity could be removed by incubation with ...

Isolation, Optimization, and Molecular Characterization of a Lipase Producing Bacterium from Oil Contaminated Soils

Lipases have many applications in biotechnology, thanks to their ability of acylglycerides hydrolysis. They alsp possess the unique feature of acting at the lipid-water interface, which distinguishes them from esterases. Commercially useful lipases are produced by microorganisms with the extracellular lipase being produced by many bacteria including Pseudomonas. The greatest production of lipas...

Isolation, Optimization, and Molecular Characterization of a Lipase Producing Bacterium from Oil Contaminated Soils

Lipases have many applications in biotechnology, thanks to their ability of acylglycerides hydrolysis. They alsp possess the unique feature of acting at the lipid-water interface, which distinguishes them from esterases. Commercially useful lipases are produced by microorganisms with the extracellular lipase being produced by many bacteria including Pseudomonas. The greatest production of lipas...