Purpurin

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Purpurin or purpurine may refer to:

  • Purpurin (dye) or 1,2,4-Trihydroxyanthraquinone, a natural red/yellow dye found in the madder plant
  • Purpurin (protein), a protein, belonging to the lipocalin family
  • Purpurin (glass), a red or reddish-brown ancient type of glass
  • Purpurine, an earlier, but still occasionally seen, name for uroerythrin, the pink/red precipitate from urine
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