Figure 3.

Expression pattern of probe sets for the same gene: 35828_at in U95Av2 and 208978_at in U133A (matched by Affymetrix "Best Match"). (a) The expression patterns before gene scaling. Even though their shapes are somewhat similar, their scales are very different, (b) The expression patterns after gene scaling. After gene scaling, the similarity in the patterns is more clearly visible and these genes have a comparable effect on the clustering of the samples.