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Table 3 The occurrence of putative stem-loop sequences with 7-nt loop and "AAA" signature in the YE-IGS of Equisetum ramosissimum and E. arvens e

From: Evolution of the rpoB-psbZ region in fern plastid genomes: notable structural rearrangements and highly variable intergenic spacers

Stem length (base pair)

Equisetum ramosissimum

E. arvense1

E. arvense2

3

21

24

28

4

3

2

2

5

8

12

12

6

8

22

24

7

2

4

4

8

16

6

6

9

6

5

4

10

2

3

2

13

2

0

0

Total

68

78

82