Table 1. Diameters Inferred from the Initial Decay of Autocorrelations for Different Salts.

sample composition	diameters in nm
200 mM KCl	104.7 ± 0.2
100 mM MgCl2	188 ± 3
Tris/HCl at pH 8.5	166 ± 1
plain water	(337 ± 28) see text