Capture hybridization analysis of RNA targets (CHART).

The genome is regulated by trans-acting factors that bind to specific loci in chromatin. In addition to protein factors, it has become clear that large non-coding RNAs can also act on chromatin at sites distant from where they are transcribed. This unit describes a means of identifying the genomic targets of those large non-coding RNAs. To accomplish this, the endogenous RNA of interest (here Drosophila roX2 is used as an example) is enriched from cross-linked chromatin extracts using short biotinylated complementary oligodeoxyribonucleotides. The targets of the RNA can be determined by examining the proteins and DNA that are enriched under these conditions. This analysis can be extended genome-wide by subjecting the enriched DNA to deep sequencing.