Figure 1. Histogram showing the mean cycle threshold (CT) distribution (± 1 SD) for experimental and control groups at 6 hrs. The mean values were determined from 3 replicate microarray plates. Low CT values (< 25) represent genes present at high transcript copy number. Genes with CT values of greater than 35 (absent calls) were considered to lie outside the detection threshold of the system. The cycle threshold distribution for the six-hour time-point was representative of the pattern observed at 12 and 24 hrs.