The labeled ChIP DNA and Input DNA were then combined and hybridized to the NimbleGen arrays.
MSCs were induced for osteogenesis for 7 days as previously described [10], and ChIP-on-chip assays were performed with antibodies against H3K9Ac and H3K9Me2 by co-hybridizing differentially labeled ChIP-enriched and total input DNAs to human promoter arrays.
These results suggest that other sources of variation (e.g. day-to-day variation, labelling, chip-batches) are of greater influence on the total variation of microarray hybridisations rather than the RNA amplification itself.
Probe labeling, chip hybridization, and scanning were performed according to the manufacturer's instructions for IVT Express Labeling Kit (Affymetrix).
RNA labeling, chip hybridization and chip scanning was carried out at the Ohio State University Comprehensive Cancer Center by (Columbus, OH) using standard Affymetrix protocols (Affymetrix, Santa Clara, CA).
Detailed information on handling of liver biopsy samples, protocols for RNA labeling, chip hybridization and signals, internal controls, normalization procedures, and analysis of gene expression were deposited in Gene Expression Omnibus [GEO GSE15235].
20 pmol of each labeled DNA (chip and control) was combined and used to hybridize to a Human ChIP-chip 3 × 720K RefSeq Promoter Array (Roche NimbleGen, Madison, WI) using a hybridization kit, sample tracking controls, wash buffer kit and array processing accessories from NimbleGen.
PCR amplification, DNA fragmentation, labeling and chip hybridization were performed according Affymetrix CustomSeq Resequencing protocol.
Fragmented and labelled WGA ChIP and input DNA was hybridised to GeneChip® Human Promoter 1.0R arrays (Affymetrix, Santa Clara, CA, USA) at the RCGFA.
Advanced Micro said it would soon begin selling a new version of its server chips, the Athlon MP, following a recently announced plan for labeling chips.
