This suggests that, at least in theory, a 50-gene microarray, together with the right software, could provide an extremely accurate diagnostic tool.

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They also recommend that new technologies, such as microarray analysis of gene activity, be used by regulators alongside conventional assessments of nutritional value and toxicity.

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The method requires a series of advanced laboratory procedures, microarray chips and a high-speed gene-sequencing machine to assemble the strands in the proper order, correct any errors and then read the final text.

WSJ: Harvard Researchers Turn Book Into DNA Code