Chromatin immunoprecipiation

Abbreviation Bp, nucleotide base pairs cDNA, complementary DNA ChIP, chromatin Immunoprecipi-tation Cy5, cyanine 5-dCTP Cy3, cyanine 3-dCTP ESTs, expressed sequence tags FDR, false discovery rate MIAME, minimum information about a microarray experiment mRNA, RNA, messenger NIA, National Institutes of Aging RFUs, relative fluorescence units RT-PCR, reverse transcriptase polymerase chain reaction SAGE, serial analysis of gene expression SAM, significance analysis of microarrays... 

Since microarrays are simply spots of DNA arrayed in a known pattern, they also can be used for DNA-DNA hybridization studies. This is the basis for using micro-arrays for comparative DNA hybridizations, single nucleotide polymorphism (SNP) discovery, and chromatin immunoprecipiation followed by microarray chip hybridization (ChIP on chip analyses) to identify transcription factor binding sites (discussed below). 

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