Table 3.

The average lifetime of R₉ aggregates (in ps) of different sizes (dimer–heptamer and higher aggregates) at the POPC bilayer for low and high peptide concentrations in systems with different salt compositions and concentrations. The error bar is the standard deviation of the mean value when multiple aggregation events occur. The range of aggregate lifetimes is presented for larger aggregates (> heptamer).

system	dimer	trimer	tetramer	pentamer	hexamer	heptamer	> heptamer
Water	a 297 ± 38 b 799 ± 50	– 335 ± 20	– 270 ± 32	– 207 ± 43	– 150 ± 29	– –	– –
0.133 m NaCl	492 ± 88 857 ± 60	– 360 ± 22	– 287 ± 25	– 218 ± 23	– 140 ± 21	– 220 ± 58	– –
1.065 m NaCl	928 ± 103 638 ± 26	652 ± 141 425 ± 18	380 ± 77 352 ± 18	c∼300 241 ± 17	– 258 ± 21	– 159 ± 13	– 150 – 200
0.133 m CaCl2	760 ± 119 561 ± 31	231 ± 55 337 ± 19	c∼100 254 ± 20	– 159 ± 71	– 129 ± 14	– 217 ± 48	– c∼100
1.065 m CaCl2	1030 ± 144 659 ± 48	493 ± 53 443 ± 31	366 ± 65 321 ± 23	138 ± 18 273 ± 20	– 237 ± 20	– 244 ± 19	– 150 – 250

^aThe upper row shows data for low peptide concentration.

^bThe lower row shows data for high peptide concentration.

^cA single continuous aggregation event.