For the GeneChip® S. pombe Tiling Array from Affymetrix the DNA was amplified to obtain 5 micrograms of DNA then fragmented around 100 base pairs using DNAse I, labelled with biotin and hybridized according to Affymetrix recommendations (Lengronne et al., 2004). Antibodies specific for GFP (Applied Biosciences 8372-2) for each IP.
Data processing
ChIP-chip Affymetrix signals per chip normalized to the 50th percentile