title: GSM2228897: H3K4me1 rep 2 Chip-Seq EpiSC; Homo sapiens; ChIP-Seq
library_construction_protocol: EpiSC and differentiated keratinocytes were trypsinized and crosslinked in 1% formaldehyde (FA) for 10 min at room temperature (RT). For ChIPs from EBs, crosslinking was performed for 30 min at RT in 4% FA. Crosslinking was quenched with 0.125 M glycine. Pelleted cells were lysed in 1 ml ChIP buffer and sonicated for 15 min in a Bioruptor (Diagenode). Soluble material was quantified by Bradford assays. To immunoprecipitate transcription factors, 2000 mg of protein and 100 mg of immunoprecipitated histone/histone modifications were used. Antibodies (10ug for DnmtA/3B and 3ug for histone modifications) were incubated overnight with the chromatin. Immunocomplexes were recovered with 30 ul of protein A bead slurry (Healthcare. Cat # 17-5280-01). Immunoprecipitated material was washed three times with low salt buffer and one time with high salt buffer. DNA complexes were decrosslinked at 65_C overnight, and DNA was then eluted in 50 ul of water using the PCR purification kit (QIAGEN)
attributes.tag: GEO Accession
attributes.value: GSM2228897