Table I. Densities of the collected interphases and their protein concentrations of 8 sucrose density gradients (n = 8).

Interphase	% Sucrose (w/w)±S.D.	Protein conc. μg μl−1
18/25	20.2 ± 1.4	0.28 ± 0.17
25/30	27.9 ± 0.4	0.24 ± 0.15
30/34	31.9 ± 0.5	0.31 ± 0.25
34/38	36.6 ± 0.2	1.08 ± 0.65
38/45	40.4 ± 0.5	9.48 ± 3.13