TABLE 6

Ontological analysis of the AHR effect on transcript expression

Ontological analysis used the GOMiner software package (Zeeberg et al., 2003), which performs a two-tailed Fisher's exact test to determine over-representation of GO categories in the gene list relative to the array as a whole. The GO term and name are given, along with the total number of genes in the category and the numbers of over- and underexpressed genes that have this annotation. p values, shown in parentheses, are calculated for enrichment of the term as a whole and for enrichment of the term among over- and underexpressed genes alone. GO categories shown were selected from those showing statistical significance (P < 0.001) in the AHR effect.

GO Total Under Over Name
GO:0006725 68 (<10-4) 7 (<10-4) 2 (0.1505) Aromatic compound metabolism
GO:0006118 239 (<10-4) 13 (<10-4) 6 (0.034) Electron transport
GO:0016705 63 (<10-4) 9 (<10-4) 2 (0.1332) Oxidoreductase activity, acting on paired donors, with incorporation or reduction of molecular oxygen
GO:0016491 483 (<10-4) 25 (<10-4) 16 (<10-4) Oxidoreductase activity
GO:0004497 80 (<10-4) 7 (0.0001) 4 (0.0087) Monooxygenase activity
GO:0005792 85 (<10-4) 7 (0.0001) 5 (0.0017) Microsome
GO:0006082 245 (0.0001) 14 (<10-4) 3 (0.4524) Organic acid metabolism
GO:0006519 153 (0.0002) 11 (<10-4) 1 (0.7912) Amino acid and derivative metabolism
GO:0009308 174 (0.0002) 12 (<10-4) 1 (0.832) Amine metabolism
GO:0009310 39 (0.0003) 5 (0.0001) 1 (0.3277) Amine catabolism
GO:0008483 27 (0.0003) 5 (<10-4) 0 (1) Transaminase activity
GO:0006520 116 (0.0004) 10 (<10-4) 0 (1) Amino acid metabolism
GO:0016769 28 (0.0004) 5 (<10-4) 0 (1) Transferase activity, transferring nitrogenous groups
GO:0009074 8 (0.0006) 3 (0.0001) 0 (1) Aromatic amino acid family catabolism
GO:0009063 30 (0.0006) 5 (<10-4) 0 (1) Amino acid catabolism
GO:0007162 9 (0.0009) 0 (1) 3 (0.0001) Negative regulation of cell adhesion