Ames test

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Ames test

biochemistry

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June 17, 2026

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The Ames test is a biochemical assay used to identify potential carcinogens. Developed by biochemist Bruce Ames in the 1970s, the test assesses a chemical's ability to induce mutations in bacteria, specifically Salmonella typhimurium. This rapid and inexpensive method allows for initial screening of mutagenicity, helping to determine if chemicals pose health risks to humans. The test has led to the ban of several synthetic chemicals previously in common use. Bruce Ames also noted that many naturally occurring substances can be carcinogenic, challenging the notion that synthetic chemicals are inherently more dangerous.12

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Bruce Ames
The Ames test
Ames owed much of his celebrity to the Ames test. The test targets chemical mutagens, the agents that tend to increase the frequency or extent of genetic mutation. The test was rapid and inexpensive, and thus it was more effective for initial mutagenicity…
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Ames owed much of his celebrity to the Ames test. The test targets chemical mutagens, the agents that tend to increase the frequency or extent of genetic mutation. The test was rapid and inexpensive, and thus it was more effective for initial mutagenicity…
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cancer
Initiators
This test, called the Ames test, has been used to detect the majority of known carcinogens.
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This test, called the Ames test, has been used to detect the majority of known carcinogens.
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pharmaceutical industry
Teratogenicity and mutagenicity tests
…bacterial point mutation test (the Ames test), a chromosomal aberrations test in mammalian cells in vitro, and an in vivo (intact animals) test.
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…bacterial point mutation test (the Ames test), a chromosomal aberrations test in mammalian cells in vitro, and an in vivo (intact animals) test.
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human genetic disease
Industrial chemicals
…inexpensive test for mutagenicity, the Ames test, utilizes mutant strains of the bacterium Salmonella typhimurium and can be completed in a few days. Testing for carcinogenesis, on the other hand, is very time-consuming and expensive because the test substance must be administered to large numbers of laboratory animals, usually mice,…
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…inexpensive test for mutagenicity, the Ames test, utilizes mutant strains of the bacterium Salmonella typhimurium and can be completed in a few days. Testing for carcinogenesis, on the other hand, is very time-consuming and expensive because the test substance must be administered to large numbers of laboratory animals, usually mice,…
Read More