#operon  a segment of DNA containing adjacent genes including structural genes and an operator gene and a regulatory gene
  supertype:  #DNA__deoxyribonucleic_acid__desoxyribonucleic_acid__desoxyribonucleicacid  a nucleic acid consisting of large molecules shaped like a double helix; associated with the transmission of genetic information; "DNA is the king of molecules"
  part:  #operator_gene  a gene that activates the production of messenger RNA by adjacent structural genes
  part:  #regulatory_gene__regulator_gene__regulatorgene  a gene that produces a repressor substance that inhibits an operator gene

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