Escherichia coli K12 Chromatin Immunoprecipitation chip (Oxford Gene Technology, Oxford, UK), called the OGT Chip2 E. coli K12 microarray, can be used to: identify the binding positions of any DNA binding proteins in a cell; analyze specific changes under various environmental conditions; as a model system to further understand gene regulation; or to reveal potential therapeutic targets against a prokaryotic species. Each microarray is fabricated using an ink-jet in-situ synthesis (IJISS) platform and interrogates the whole E. coli K-12 genome with a probe density of 22,000 oligonucleotide features. ChIP microarray data generated can then be analyzed in relation to its relative gene position using an OGT developed ChIP browser, reducing the time taken to analzse the data.