title: GSM1479204: H3K27ac_mBrain_ChIPseq; Mus musculus; ChIP-Seq
library_construction_protocol: For ChIP-seq in mouse brain, the whole brains were homogenized with a glass douncing homogenizer. The cell homogenate was fixed with 1% paraformaldehyde for eight min at room temperature and quenched with 0.125 M glycine for five min at room temperature, followed by centrifugation through a 29% iodixanol cushion. The nuclei pellet was resuspended and sonicated using a Diagenode Bioruptor to an average size of ~250 bp. After pre-clearing with BSA-blocked protein G Sepharose, chromatin was incubated with antibodies at 4°C overnight. The chromatin immunocomplexes were recovered with the same BSA-blocked protein G beads.For ChIP-seq in 393T-REx cells, cells were crosslinked with 1% formaldehyde for eight min at room temperature and the nuclei were then isolated. As described above, following sonication and pre-clearing, chromatin IP was performed to isolate associated DNA. For ChIP-seq library construction, 5-10 ng of DNA extracted from the chromatin immunocomplexes. Libraries were prepared according to manufacturer’s instructions (Illumina). Immunoprecipitated DNA was first end-repaired using End-It Repair Kit (Epicenter), tailed with an A using Klenow exo minus (NEB M0212), and ligated to custom adapters with LigaFast (Promega, city, state #M8225). Fragments of 350±50 bp were size-selected and subjected to ligation-mediated PCR amplification (LM-PCR), using Phusion DNA polymerase (NEB M0530).
attributes.tag: GEO Accession
attributes.value: GSM1479204