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Table 4 Characteristic values for the distribution of intensities (arbitrary units) in different experimental conditions

From: Extracting biological information from DNA arrays: an unexpected link between arginine and methionine metabolism in Bacillus subtilis

  Met A 1 MTR A 1 Met B 1 MTR B 1 Met A 10 MTR A 10 Met B 10 MTR B 10
First 406 381 300 293 523 548 532 488
quartile         
Second 597 559 434 422 762 833 797 756
quartile         
Third 970 913 719 693 1,230 1,371 1,335 1,294
quartile         
  1. The genes were ranked according to the intensity of the corresponding hybridization; the values were then arranged into four sets of equal numbers, with increasing hybridization values. The value for the highest hybridization in each quartile is given here. Met, methionine; MTR, methylthioribose; A and B refer to different days, and 1 and 10 refer to the amount of RNA (see text).