A BIOSENSOR UTILIZING PIGMENT-SYNTHESIZING GENE OF A PURPLE NON-SULFUR BACTERIUM AND A METHOD FOR PREPARING SUCH A BIOSENSOR

摘要

It is intended to provide a biosensor whereby measurement can be performed bya more convenient procedure and a specific chemical can be economically andvisually detected. Namely, a biosensor for detecting a specific chemicalcomprising a recombinant purple non-sulfur bacterium which carries a sensorvector having been transferred into a pigment mutant of a purple non-sulfurbacterium with the deletion of a gene encoding spheroidene monooxygenase,characterized in that, in the sensor vector as described above, an inductivepromoter showing a specific response to the specific chemical is connected inan operable matter in the upstream of thegene encoding spheroidenemonooxygenase.