Immobilization as a technical possibility for long-term storage of bacterial biosensors

Seo Park Kyeong, Christa Baumstark-Khan, Petra Rettberg, Gerda Horneck, Elke Rabbow, Bock Gu Man

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


For applications in field experiments, the recombinant strain Salmonella typhimurium TA1535 was immobilized to permit its immediate utilization after long storage periods. Salmonella typhimurium TA1535 cells contain the plasmid that has an inducible SOS promoter fused to a promoterless luxCDABFE operon from Photobacterium leiognathi. The induction of bioluminescence occurs in the presence of the DNA-damaging agent mitomycin C which stimulates the bacterial SOS response. Early stationary phase cells were immobilized at a cell concentration of 1010 CFU/ml in microtiter plates and stored up to 6 weeks at 4°C in a sealed container. Even after 4 weeks of storage, the bioluminescence kinetics and yield in response to different concentrations of mitomycin C were not significantly different from those of freshly prepared samples.

Original languageEnglish
Pages (from-to)69-71
Number of pages3
JournalRadiation and Environmental Biophysics
Issue number1
Publication statusPublished - 2005 May
Externally publishedYes

ASJC Scopus subject areas

  • Biophysics
  • Radiation
  • Environmental Science(all)


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