Journal
BIOTECHNIQUES
Volume 38, Issue 3, Pages 397-400Publisher
FUTURE SCI LTD
DOI: 10.2144/05383ST02
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The protocol described here is an adapted version of the toeprinting assay in which the oligonucleotide used to prime the reverse transcription step is labeled with a fluorescent dye instead of P-32. By using a fluorescent dye, the results of the assay arc obtained within one hour by direct electrophoresis of the samples on an automated sequencing machine. This eliminates the need to cast and run polyacrylamide gels and to wait to expose dried gels. We show that an identical toeprint was found for the chloramphenicol acetyltransferase transcript using this nonradioactive Method, which is in agreement with the previously published P-32-labeled method. Furthermore, in addition to being a faster and safer method, a larger region of sequence can be analyzed with one primer in a single experiment.
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