TABLE 2.

Persistence length versus fractional charge neutralization

x	P (nm)
0.0	56.5
0.3	33.2
0.4	21.2
0.5	14.9
0.6	11.1
0.7	8.6
1.0	7.0

The persistence lengths, P, calculated from a modification of Eq. 1 for fractional neutralization of negatively charged phosphates, x. The value for fully ionized DNA, x = 0, is taken from Table 1 for DNA on uncoated mica.