Table 2 Summary and comparison of pre-miRNA base pairing and nucleotide composition

Human

S _n (132)

68.66 ± 7.83

42.73 ± 16.12

47.11 ± 13.18

22.10 ± 7.89

25.01 ± 6.96

27.49 ± 7.90

25.40 ± 7.24

S _c ¹ (60)

71.88 ± 6.20^A

49.34 ± 11.81^Ab

53.87 ± 10.66^A

23.78 ± 6.36

30.09 ± 6.42^A

24.45 ± 5.53^AB

21.68 ± 5.84^A

S _c ² (66)

72.94 ± 5.64^Ab

48.67 ± 8.17^AB

51.62 ± 7.15^AB

23.41 ± 4.74^B

28.21 ± 4.42^AB

25.71 ± 3.49^aB

22.67 ± 5.11^AB

S _c ³ (33)

73.48 ± 4.67^AB

50.14 ± 11.02^Ab

52.94 ± 9.67^a

22.96 ± 6.05

29.98 ± 6.16^A

26.06 ± 5.15^B

20.99 ± 5.92^A

Mouse

S _n (108)

67.87 ± 6.51

44.35 ± 11.20

49.30 ± 9.65

22.40 ± 6.16

26.90 ± 5.97

27.28 ± 5.57

23.42 ± 5.74

S _c ¹ (63)

72.53 ± 5.85^A

48.20 ± 11.47^a

53.07 ± 9.42a

23.29 ± 5.42

29.78 ± 6.11^A

25.30 ± 5.28^a

21.62 ± 5.16^a

S _c ² (75)

72.10 ± 5.87^A

47.70 ± 8.14^aB

50.57 ± 6.77^B

22.90 ± 4.57^b

27.67 ± 4.40^b

26.28 ± 3.72^B

23.15 ± 5.02

S _c ³ (39)

73.37 ± 5.13^A

50.85 ± 10.93^A

53.05 ± 9.15a

22.89 ± 5.90

30.16 ± 5.51^A

26.06 ± 5.06

20.90 ± 5.53^a

Chicken*

S _n (21)

68.24 ± 7.37

37.13 ± 17.43

44.17 ± 14.75

19.47 ± 8.79

24.69 ± 8.01

29.35 ± 6.00

26.48 ± 9.74

S _c ² (40)

70.89 ± 7.06

51.22 ± 7.19^AB

55.11 ± 4.99^AB

24.60 ± 4.14^B

30.52 ± 3.97^AB

24.80 ± 3.53^AB

20.08 ± 3.24^aB

S _c ³ (19)

73.08 ± 5.14^a

53.80 ± 7.56^AB

57.18 ± 5.72^AB

24.45 ± 5.26

32.74 ± 3.26^AB

23.94 ± 4.49^A

18.87 ± 3.33^AB