TY - GEN
T1 - An optical micro-instrumentation system for measurement of fluorescent proteins in whole-cell biosensors
AU - Martineau, Rhett L.
AU - Towe, Bruce C.
AU - Stout, Valerie
PY - 2006
Y1 - 2006
N2 - One well-developed paradigm for biosensing uses living microorganisms as sensors for environmental stimuli. In this paradigm, engineered cells contain plasmid or chromosomal sequences that link stress-inducible promoters to the production of fluorescent reporter proteins. We are developing such a sensor system with an aim for portability. This work describes the development and performance of a compact optical system designed for low-power detection of fluorescent reporter proteins in microliter-scale cell suspensions. Light-emitting diodes (LEDs) and silicon photodetectors (PDs) were configured to measure red fluorescence, green fluorescence, and cell biomass pseudosimultaneously in 100 μl samples. The optical detectors were calibrated using E. coli cells that expressed red and green fluorescent proteins (dsRed2 and gfp-asv, Clontech) either constitutively or through chemical induction. We show that sufficient sensitivity for certain whole-cell biosensor applications is achievable in low-volume samples, despite the simplicity and low-cost nature of the detector system. The prototype optical detector occupies approximately 1.8 cm x 2.2 cm x 3.0 cm.
AB - One well-developed paradigm for biosensing uses living microorganisms as sensors for environmental stimuli. In this paradigm, engineered cells contain plasmid or chromosomal sequences that link stress-inducible promoters to the production of fluorescent reporter proteins. We are developing such a sensor system with an aim for portability. This work describes the development and performance of a compact optical system designed for low-power detection of fluorescent reporter proteins in microliter-scale cell suspensions. Light-emitting diodes (LEDs) and silicon photodetectors (PDs) were configured to measure red fluorescence, green fluorescence, and cell biomass pseudosimultaneously in 100 μl samples. The optical detectors were calibrated using E. coli cells that expressed red and green fluorescent proteins (dsRed2 and gfp-asv, Clontech) either constitutively or through chemical induction. We show that sufficient sensitivity for certain whole-cell biosensor applications is achievable in low-volume samples, despite the simplicity and low-cost nature of the detector system. The prototype optical detector occupies approximately 1.8 cm x 2.2 cm x 3.0 cm.
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U2 - 10.1109/BMN.2006.330891
DO - 10.1109/BMN.2006.330891
M3 - Conference contribution
AN - SCOPUS:50249172807
SN - 1424400562
SN - 9781424400560
T3 - 2nd ASM-IEEE EMBS Conference on Bio-, Micro- and Nanosystems
SP - 90
EP - 93
BT - 2nd ASM-IEEE EMBS Conference on Bio-, Micro- and Nanosystems
T2 - 2nd ASM-IEEE EMBS Conference on Bio-, Micro- and Nanosystems, BMN
Y2 - 15 January 2006 through 18 January 2006
ER -