The collection, interpretation and storage of information about gene and protein activity in order to identify toxic substances in the environment and those populations at greatest risk to environmental diseases.

Toxicogenomics is a new scientific field that elucidates how the entire genome is involved in biological responses of organisms exposed to environmental toxicants/stressors. Toxicogenomics combines information from studies of genomic-scale mRNA profiling (by microarray analysis), cell-wide or tissue-wide protein profiling (proteomics), genetic susceptibility, and computational models to understand the roles of gene-environment interactions in disease. (from National Center for Toxicogenomics homepage)