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  1. ..., University of Cambridge, Cambridge CB3 0DH, United Kingdom Abstract Most vertebrate promoters lie in unmethylated CpG-dense islands, whereas methylation of the more sparsely distributed CpGs in the remainder of the genome is thought to contribute to transcriptional repression. Nonmethylated CG...
  2. ...analysis of CpG dinucleotides in the human distinguishes two distinct classes of promoters. Proc Natl Acad Sci 103: 1412–1417. Suzuki MM, Kerr AR, De Sousa D, Bird A. 2007. CpGmethylation is targeted to transcription units in an invertebrate . Genome Res 17: 625– 631. Weber M, Hellmann I, Stadler MB, Ramos...
  3. ...at an average depth of 95.72× for the SD sample and 88.97× for the LD sample. The LD reads covered 1,304,087 CpG sites (4.65% of all genomic CpGs), whereas the SD reads covered 1,385,067 CpG (4.94%). We detected 1618 and 2018 methyl CpGs in the LD and SD samples, respectively, using a 1% false discovery rate...
  4. ...-rich sequences (CpG islands), and this modification contributes to stability, transcriptional silencing of genes and retrotransposons, regulation of genomic imprinting, and X chromosome inactivation in females (Bird 2002; Jaenisch and Bird 2003). Although DNA methylation is relatively stable and heritable...
  5. ...that promoter regions of many genes are GC-rich and enriched in CpG islands (CGIs) (Larsen et al. 1992). Indeed, we found that many HCTs are located in GC-rich regions, especially those of PWMs with abundant (>1000) HCTs (Fig. 3; Supplemental Table S2). These all have GC content higher than 60...
  6. ...CpG density, gene expression, transcription factor motifs, gene ontology, and correlation with other epigenetic marks such as histone modifications. DNA methylation is indispensable for function in mammals. It is the only known epigenetic modification of mammalian DNA and plays critical roles...
  7. ...) prompted us to test the relationship between CGIs and ULIs. This showed a correlation between interactions and the density of CpG dinucleotides at CGIs devoid of polycomb (Fig. 2A). Interaction strength at TSSs also scaled strongly with the level of transcription (Fig. 2B). Notably, TSSs in quartile 4...
  8. ...) Average number of GpC and CpG occurrences per prime. Error bars in D represent SD. (E) Number of quasi-primes detected in each reference .There are more omers than expected across s in each taxonomyIn a previous study, we demonstrated that the human exhibits a higher prevalence of omers than...
  9. ...27me3, etc.) (Supplemental Table S2A; Shen et al. 2012; Yue et al. 2014), and features from the underlying DNA sequence (e.g., %CpG in promoter, etc.). The models were trained with sets of features that were either (1) “dynamic”—reflecting the age-related changes in the chromatin environment of genes...
  10. ...is indicated by a green line only in a region of DNA that satisfies the criterion (2). Therefore, the green line represents the existence of a CpG island in the DNA region, because the region satisfies all three criteria explained above. Search for EST Sequences Homologous to Bidirectional Transcription Pairs...
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