Core proteomes vary little in size

• Proteome: all the proteins encoded in a genome

• Core proteome

  • Count each group of paralogous proteins only once
  • Number of distinct protein families in each organism

• Species Number of genes Core proteome

  • Haemophilus 1709 1425
  • Yeast 6241 4383
  • Worm 18424 9453
  • Fly 13601 8065

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