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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]