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Table 6 Domain distribution of validated orphans

From: A survey of orphan enzyme activities

Domain

No. Species

Proportion

Eukaryota

156

54.36%

Eubacteria

113

39.37%

Unknown

15

5.23%

Viruses

2

0.70%

Archaea

1

0.35%

  1. Orphans with "Unknown" listed for their domain tend to be microbes that were insufficiently characterized to place them in either the Eubacteria or Archaea domains.