KOG classification of the germline SAGE library. (A) KOG distribution of the germline library based on either the number of genes or the number of tags. A total of 3555 genes can be assigned a KOG classification in the germline SAGE library. "Information Storage and Processing" is over-represented in distribution by the number of tags, and this over-representation is mainly contributed by the subcategory "Translation, Ribosomal Structure and Biogenesis". The over-representation of "Information Storage and Processing" is not observed in the soma library (data not shown). Overall, the KOG distribution by the number of genes is highly similar between the germline library and the soma library; however, some categories or sub-categories do show some enrichment in the germ line or soma, the most striking of which are described in the text (data not shown). (B) Shown are the percentages of the KOG sub-categories with respect to the total number of genes (upper panel) or the total number of tags (lower panel) assigned with KOGs.