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We present a new modular concept to construct organizational models for transcriptional regulatory DNA units. The method requires a training set of at least 10 sequences and a simple initial model (e.g. two characteristic transcription factor binding sites). The final model is generated by computer analysis directly from the sequences. 20 Lentivirus long terminal repeats (LTRs) and an initial model...
Functional promoters are composed of individual modules (e.g. transcription factor binding sites, secondary structure elements, repeats) arranged in distinct patterns. Recognition of such patterns is essential for identification of promoters in non-coding sequences. However, this is difficult due to the absence of overall sequence similarity in promoters even if they are regulated in a similar way...
The current genome sequencing projects reveal megabases of unknown genomic sequences. About 1% of these sequences can be expected to be of retroviral origin. These are often severely deleted or mutated. Therefore, identification of the retroviral origin of these sequences can be very difficult due to the absence of convincing overall sequence similarity. There are also many copies of solo-LTRs (long...
Retroviruses are expressed under the control of viral control regions designated long terminal repeats (LTRs), which contain all signals for transcriptional initiation as well as transcriptional termination. However, retroviral LTRs from different species within a common genus, such as Lentivirus, do not show significant overall sequence homology. We compiled a model of the functional organization...
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