title: GSM8841545: Input_exp_7; Mus musculus; ChIP-Seq
library_construction_protocol: genomic DNA Cells were fixed for 15mins in 1% formaldehyde, quenched with glycine. Cells were lysed to extract nuclei which were then sonicated to obtain sheared genomic DNA ~100-300bp in size for sequencing. The libraries were prepared according to standard Illumina's TruSeq Chip protocol. The ChIP DNA is blunt-ended and phosphorylated. A single 'A' nucleotide is added to the 3' ends of the fragments in preparation for ligation to an adapter that has a single-base 'T' overhang. The ligation products are purified and size-selected. The size-selected DNA is purified and PCR-amplified to enrich for fragments that have adapters on both ends. The final purified product is then quantitated by qPCR before cluster generation and sequencing.