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351) The analysis confirmed the periodicity of TA dinucleotides in the strong nucleosomes, and revealed as well other periodic sequence elements, notably classical AA and TT dinucleotides.
* Visible periodicity of strong nucleosome DNA sequences.
- Fifteen years ago, Lowary and Widom assembled nucleosomes on synthetic random sequence DNA molecules, selected the strongest nucleosomes and discovered that the TA dinucleotides in these strong nucleosome sequences often appear at 10-11 bases from one another or at distances which are multiples of this period. We repeated this experiment computationally, on large ensembles of natural genomic sequences, by selecting the strongest nucleosomes--i.e. those with such distances between like-named dinucleotides, multiples of 10.4 bases, the structural and sequence period of nucleosome DNA. The analysis confirmed the periodicity of TA dinucleotides in the strong nucleosomes, and revealed as well other periodic sequence elements, notably classical AA and TT dinucleotides. The matrices of DNA bendability and their simple linear forms--nucleosome positioning motifs--are calculated from the strong nucleosome DNA sequences. The motifs are in full accord with nucleosome positioning sequences derived earlier, thus confirming that the new technique, indeed, detects strong nucleosomes. Species- and isochore-specific variations of the matrices and of the positioning motifs are demonstrated. The strong nucleosome DNA sequences manifest the highest hitherto nucleosome positioning sequence signals, showing the dinucleotide periodicities in directly observable rather than in hidden form.
Overview of verb reveal
The verb reveal has 3 senses (first 2 from tagged texts)
1. (34) uncover, bring out, unveil, reveal -- (make visible; "Summer brings out bright clothes"; "He
brings out the best in her")
2. (17) unwrap, disclose, let on, bring out, reveal, discover, expose, divulge, break, give away,
let out -- (make known to the public information that was previously known only to a few people or
that was meant to be kept a secret; "The auction house would not disclose the price at which the van
Gogh had sold"; "The actress won't reveal how old she is"; "bring out the truth"; "he broke the news
to her"; "unwrap the evidence in the murder case")
3. reveal -- (disclose directly or through prophets; "God rarely reveal his plans for Mankind")
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