"p" indicates that "C" and "G" are connected by a phosphodiester bond.
CpG islands are often located around the promoters of housekeeping genes (which are essential for general cell functions) or other genes frequently expressed in a cell.
CpG island: Repetitive CpG doublets creating a region of DNA greater than 200 bp in length with a G+C content of more than 0.5 and an observed/expected presence of CpG more than 0.6.
Cpg islands Regions of DNA rich in the sequence cpg, usually located at the 5' region of genes; the cytosine bases of these islands can be methylated to inhibit transcription of the associated gene.
CpG island
Short region of DNA in which the frequency of the CG sequence is higher than in other regions. "p" indicates that "C" and "G" are connected by a phosphodiester bond.
CpG islands are short (1-kb) regions of genomic DNA with a high GC content and reduced methylation of C residues. About 60% of genes have these islands at their 5' ends, making CpG islands useful markers for transcriptional units.
hormone (CRH) Cortisol Corynebacteria Cottony cushion scale insect Cotyledon Countercurrent exchangers Covalent bond Cowpox COXInitials used for two entirely different molecules: cytochrome c oxidase and cyclooxygenase CpG islands Cranial nerves ...
DNA methylation frequently occurs in repeated sequences, and may help to suppress 'junk DNA':[8] Because 5-methylcytosine is chemically very similar to thymidine, CpG sites are frequently mutated and become rare in the genome, except at CpG islands ...
 See also: Express, DNA, Sequence, Protein, Trans
  
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