GO terms of microarray genes differentially regulated by ≥ 2-fold with p-values < 0.5 using KEGG Spider. Expression data are from microarray analysis of transcripts showing ≥ 2-fold expression change with p-values < 0.5 and grouped into GO terms using KEGG Spider. The pie chart illustrates the ECM-related proteins in shades of blue, adhesion-related proteins in shades of red, signaling-factors in shades of green, and others in shades of gray. 50% of all GO terms identified can be broadly grouped into cell motility-related genes. For a list of differentially expressed genes and corresponding GO Terms, see [Additional file 5].