What are the sample requirements for ChIP-chip?
For a 385K or 4x72K ChIP-chip array, 3.5µg of ChIP DNA is required per array and for a 2.1M ChIP-chip array, 6.5µg of ChIP DNA is required. In both cases, the concentration of the ChIP DNA should be between 250-1000ng/µl, and the majority of the fragments should greater than 200bp long. The A260/A280 ratios should be at least 1.7 and the A260/A230 ratios should be at least 1.6.
