#animal_pigment  pigment occurring in animals
  supertype:  #pigment  dry coloring matter (especially an insoluble powder to be mixed with a liquid to produce paint etc)
  subtype:  #bilirubin__hematoidin__haematoidin  an orange-yellow pigment in the bile that forms as a product of hemoglobin; excess amounts in the blood produce the yellow appearance observed in jaundice
  subtype:  #urobilin  brown bile pigment formed from urobilinogens and found in feces and in small amounts in urine
  subtype:  #luciferin  pigment occurring in luminescent organisms (as fireflies); emits heatless light when undergoing oxidation
  subtype:  #melanin  insoluble pigments that account for the color of e.g. skin and scales and feathers

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