actinomycin A


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ac·ti·no·my·cin A

the first of the actinomycins isolated in crystalline form.

actinomycin A

the first of a group of chromopeptide antibiotic agents derived from soil bacteria. Most are derivatives of phenoxazine and contain actinocin. They are generally active against gram-positive and gram-negative bacteria and some fungi. Because of their cytotoxic properties, they are effective for certain types of neoplasms. See also dactinomycin.

actinomycin A

A highly toxic antibiotic obtained from Streptomyces antibioticus (Actinomyces antibioticus) that is effective against gram-positive organisms. This orange-colored heat-stable antibiotic is soluble in alcohol and ether.
See also: actinomycin