Table 1 Structural and packaging features of the four different substrates.

Periodicity (bp/turn)

10.4

10.8^a

10.8^a

11

Helical pitch (nm/turn)

3.52

3.11^a

3.11^a

3.02

Burst size (nm)

3.39 ± 0.03

3.09 ± 0.02

3.02 ± 0.02

2.70 ± 0.02

Dwell time (ms)

86 ± 0.8

105 ± 0.7

85 ± 0.5

83 ± 0.7

N traces

90

69

65

67

Forward pause-free velocity (nm/s)

36.6 ± 0.5

29.4 ± 0.2

33.9 ± 0.3

30.6 ± 0.3