Implementation of easyExon. Analysis can start from .CEL files if users choose to download the APT executives when launching easyExon (Step 1-1). Users can also start from normalized profiles produced from Affymetrix Expression Console or Partek™ GS (Step 1–2). After array grouping (Step 2), the input array data are subjected into the feature filtration step (Step 3-1 and/or 3-2). The filtered transcript clusters are annotated through the annotation database (Step 4). The final step (Step 5) comprises of gene visualizations and provides hyperlinks to IGB. The first 4 steps are similar to standard microarray analysis, while Step 5 is specific for exon array.