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UMLS ID - C0040549
Semantic Type Listed - "Biologically Active Substance Hazardous or Poisonous Substance"
Semantic Type Additional - Indicator, Reagent, or Diagnostic Aid
Definition - Specific, characterizable, poisonous chemicals, often proteins, with specific biological properties, including immunogenicity, produced by microbes, higher plants, or animals, used as a probe in labeling or biochemical experiments.
Source - modified from UMLS by Maryann Martone
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