actinomycin

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actinomycin

actinomycin (ăkˌtənōmīˈsən), any one of a group of antibiotics produced by bacteria of the genus Streptomyces. Actinomycin was the first antibiotic reported to be able to halt cancer; however, it is not widely used to treat cancers because it is highly toxic to humans, interfering with the genetic material of cells. It is mainly used as an investigative tool in cell biology.
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actinomycin

[‚ak·tə·nō′mī·sən]
(microbiology)
The collective name for a large number of red chromoprotein antibiotics elaborated by various strains of Streptomyces.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.