Rating: Very Good

Strong Points: Enormous amount of summarized studies

Weak Points: Can only search for chemicals, not genes or proteins

toxnet.nlm.nih.gov/newtoxnet/ctd.htm

The Comparative Toxicogenomics Database, from the U.S. Library of Medicine, compiles information about how chemicals encountered in the environment interact with and alter gene and protein expression. For each chemical, the website compiles a record of studies in which the chemical was used. The studies in each record are conveniently summarized for easy scanning, with each listing including information about the gene examined in the study, the organism that was used for the study, and the type of interaction that occurred between the chemical and the gene. Additionally, each study is linked to so that researchers can access the full article. The website has a basic search feature, making it easy for users to quickly find the chemical they are looking for. The Comparative Toxicogenomics Database is an excellent collection of information on chemicals and their interactions within biological systems and its study summaries make it easy for researchers to quickly find the information that they need.

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