摘要:
The present invention is related to an antibiotic inducible/repressible genetic construct for controlling the transcription of a gene of interes: by a cell. The genetic construct comprises a bi-directional antibiotic controlled activator-responsive promoter/operator sequence which is located between the gene of interest and a cistron encoding a reverse antibiotic controlled transactivator and controls the transcription of the gene of interest and of the cistron.