alexa Mutagen testing using TRP+ reversion in Escherichia coli.


Journal of Clinical Toxicology

Author(s): Green MH, Muriel WJ, Green MH, Muriel WJ

Abstract Share this page

Abstract Escherichia coli strain WP2 and its repair-deficient derivatives are suitable strains for mutagen screening. In these strains, agents which cause base substitution mutations can be shown to increase the frequency of Trp+ revertants. In addition, agents causing many types of DNA damage can be detected through increased killing of the repair deficient derivatives. Four ways of performing tests are described: (a) Spot tests in which a small amount of the agent under test is placed directly on a selective agar plate. Trp+ revertants are counted and increased sensitivity of repair-deficient strains determined from the size of the zone of inhibition of cell growth. (b) Treat and plate tests, where a strain is treated with the agent under test and subsequently plated to determine survival or frequency of Trp+ revertants. (c) A simplified fluctuation test which shows exceptional sensitivity in measuring mutation with low levels of mutagens. (d) Use of a liver microsomal fraction in conjunction with treat and plate tests to detect metabolically activated mutagens. The merits and defects of these systems are discussed. Common pitfalls in evaluating tests and procedures for avoiding them are described.
This article was published in Mutat Res and referenced in Journal of Clinical Toxicology

Relevant Expert PPTs

Relevant Speaker PPTs

Recommended Conferences

Relevant Topics

Peer Reviewed Journals
Make the best use of Scientific Research and information from our 700 + peer reviewed, Open Access Journals
International Conferences 2017-18
Meet Inspiring Speakers and Experts at our 3000+ Global Annual Meetings

Contact Us

© 2008-2017 OMICS International - Open Access Publisher. Best viewed in Mozilla Firefox | Google Chrome | Above IE 7.0 version