Distribution of values obtained for selected probesets with U133A arrays and U133 Plus 2.0 arrays. The probeset numbers are indicated on the left. Above each line and plotted with blue circles are the values observed with U133 Plus arrays. Below each line and plotted with red circles are the values observed for the corresponding probesets on the U133A arrays. Plotted are the log base 2 equivalents of the Signal values from 17 different arrays.