Uji Aktivitas Antibakteri Ekstrak Etanol Daun Kamboja (Plumeria Sp) Terhadap Bakteri Escherichia coli Secara In Vitro

Carbazole Alkaloids from Roots of Murraya Koenigii (Rutaceae)

The study on petroleum ether extract of the roots of Murraya koenigii (curry leaf) which involves extraction, separations by using various chromatographic methods and structural determination by spectroscopic techniques have afforded two compounds; 3-methylcarbazole and murrayafoline A. The structure of the compounds were also confirmed by comparison with the previous works. Abstrak. Kajian ter...

Isolation, Identification and in vitro Susceptibility of Avian Escherichia coli to Selected Fluoroquinolones

Functional motifs in Escherichia coli NC101

Escherichia coli (E. coli) bacteria can damage DNA of the gut lining cells and may encourage the development of colon cancer according to recent reports. Genetic switches are specific sequence motifs and many of them are drug targets. It is interesting to know motifs and their location in sequences. At the present study, Gibbs sampler algorithm was used in order to predict and find functional m...

In vitro incorporation of molybdate into demolybdoproteins in Escherichia coli.

When Escherichia coli was grown in the presence of tungstate, inactive forms of two molybdoenzymes, nitrate reductase and formate dehydrogenase, accumulated and were converted to their active forms upon incubation of cell suspensions with molybdate and chloramphenicol. The conversion to the active enzymes did not occur in cell extracts. When incubated with [(99)Mo]molybdate and chloramphenicol,...

Escherichia coli DNA photolyase stimulates uvrABC excision nuclease in vitro.

Pyrimidine dimers are the major photoproducts produced in cellular DNA upon UV irradiation. In Escherichia coli there are dark and photorepair mechanisms that eliminate the dimers from DNA and prevent their lethal and mutagenic effects. To determine whether these repair mechanisms act cooperatively or competitively in repairing DNA, we investigated the effects upon one another of DNA photolyase...