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Nucleic Acids Research, 2001, Vol. 29, No. 12 e58
© 2001 Oxford University Press

Real-time detection of gene promoter activity: quantitation of toxin gene transcription

Kandiah Jeyaseelan*, Donghui Ma and Arunmozhiarasi Armugam

Department of Biochemistry, Faculty of Medicine, National University of Singapore, 10 Medical Drive, 119260, Singapore

We have developed a new method for quantification of promoter activity in cell lines transfected with recombinant plasmids containing the reporter gene encoding chloramphenicol acetyl transferase (CAT) by real-time PCR. As the efficiency of transfection has a direct influence on the total mRNA produced, we have used the neomycin-resistance gene present within the same vector DNA to normalize the measurement of mRNA levels. Three promoters from genes encoding toxins (pre-synaptic neurotoxin phospholipase A2, post-synaptic {alpha} neurotoxin and cardiotoxin), believed to have evolved from the same ancestor but exhibiting different promoter activities, have been employed in this study to demonstrate the feasibility and accuracy of the method in CAT gene reporter analysis.

* To whom correspondence should be addressed. Tel: +65 874 3248; Fax: +65 779 1453; Email: bchjeya{at}nus.edu.sg +AF097000, AF241224, AF101235


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