O6-ethylguanine. The Ames test is a protocol for identifying mutagenic chemical and physical agents. Mutagens generate changes in DNA. Many mutagenic agents modify the chemical structure of adenine, thymine, guanine, and cytosine, the bases in...

A laboratory test developed by biochemist Bruce N. Ames to determine the possible carcinogenic nature of a substance. The Ames test involves using a particular strain of the bacteria Salmonella typhimurium that lacks the ability to synthesize...

An ASSAY conducted in vitro to detect mutations in a gene. It is named after the person leading the team that developed it and uses strains of Salmonella typhimurium in conducting the...

The Ames test is a biological assay to assess the mutagenic potential of chemical compounds. As cancer is often linked to DNA damage, the test also serves as a quick assay to estimate the carcinogenic potential of a compound since the standard tests for...

CBS Digital Media and CBS News today announced plans for a major expansion of CBSNews.com, creating a 24-hour, multi-platform digital news network, bypassing cable television in favor of the nation's fastest-growing distribution system -- broadband. [...] Key elements of the new CBSNews.com site will include:...

Juan Pablo Montoya is tanned and relaxed from all his hours on the golf course, where he escapes from his hectic NASCAR schedule.Even though he tries to squeeze in a few rounds per week, he declined to join other NASCAR stars in the pro-am at...