Statistical comparison of the Gene-Ontology distribution within the gene expression profiles, in ERK1 versus ERK2 knockdown embryos. (A) Biological process (GO:0008150), (B) Cellular component (GO:0005575) and (C) Molecular function (GO:0003674). ERK1MO and ERK2MO were compared to the whole 22K Agilent chip, based on the Unigene-ID identifiers. The graph depicts the relative fold of enrichment (x-axis) of the statistically selected GO-clusters (y-axis), within the ERK1 and ERK2 knockdown gene-pools. ERK1MO in gray, ERK2MO in black (* = P < 0.05, ** = P < 0.01). Values greater than 1 were considered over-represented, values less than1 are considered as under-represented.