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Table 2 Number of WRKY proteins of Arabidopsis (AtWRKY), rice (OsWRKY) and barley (HvWRKY) in the WRKY subgroups 1 to 3*.

From: Phylogenetic and comparative gene expression analysis of barley (Hordeum vulgare) WRKY transcription factor family reveals putatively retained functions between monocots and dicots

WRKY group AtWRKY OsWRKY** HvWRKY
1 15 16 8
2a 3 4 4
2b 8 7 1
2c 17 20 11
2d 7 6 5
2e 8 8 3
3 14 20 13
Total 72 81 45
  1. * according to Eulgem et al. [16]
  2. **according to Xie et al. [21]