Recognition region
The −35 hexamer (TTGACA) is a conserved sequence where RNA polymerase binds. Not all promoters contain an exact match — partial matches still carry signal.
PromoterLab
DNA promoter analysis
PromoterLab
Check a DNA sequence.
Submit a fragment and run the classifier to predict whether a promoter region is present.
Live Preview
58 bpGC 43%TTGACA foundTATAAT found
01 / Add
Enter a sequence
Paste a DNA fragment or choose a preset from the library. Only A, C, G, T bases are accepted.
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02 / Mark
Inspect motifs
The tool highlights the −35 and −10 consensus hexamers, if present, as contextual signals.
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03 / Run
Get a prediction
Submit the sequence to the classifier.
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04 / Review
Check history
All past runs are saved to this session for review and export.
Prediction Result
Ready for sequence input
Select a preset or enter a sequence, then run prediction.
Guide
Learn the key markers.
AT-rich region
The −10 hexamer (TATAAT or TATA) is AT-rich, making the DNA easier to melt open for transcription initiation.
Transcription start
The +1 site is where RNA polymerase begins synthesizing the downstream transcript. It marks the boundary of the promoter region.