title: GSM2058038: V429 H3K27ac ChIP Seq; Homo sapiens; ChIP-Seq
library_construction_protocol: For ChIP-Seq, lysates were clarified from sonicated nuclei and histone-DNA complexes were isolated with antibody. For DNase Hypersensitivity, nuclei were isolated and treated with DNase I. For RNA-Seq samples, cells were lysed and RNA extracted with TRIzol according to the manufacturer’s protocol. ChIP-Seq libraries were prepared with NEB reagents as previously described. Briefly, DNA was end-repaired and the blunt, phosphorylated ends were treated to yield a protruding 3- 'A' base for ligation of Illumina's adapters which have a single 'T' base overhang at the 3’ end. After adapter ligation DNA was PCR amplified with Illumina primers and library fragments of ~250 bp were band isolated from an agarose gel. DNase Hypersensitivity libraries were prepared as previously described.  Briefly, DNase I treated DNA was blunt-ended. DNA fragments were ligated to biotinylated linkers and digested with MmeI, producing 2 bp overhangs for ligation with a second linker or Illumina adapters. DNA was then PCR amplified and library fragments of ~86 bp were band isolated from a gel. RNA libraries were prepared for sequencing using standard Illumina protocols.
attributes.tag: GEO Accession
attributes.value: GSM2058038