Table 1.

Aß levels in the cortex of transgenic brain (pmol of Aß per g of wet tissue)

Age, months	n	Aß1–42	Total Aß	% Aß42
4	11	4.7  ± 1.3	17  ± 3.4	27
8	13	76  ± 40	112  ± 64	68
10	5	247  ± 133	248  ± 139	99
12	9	615  ± 333	694  ± 403	89
16	10	3538  ± 1104	3813  ± 1327	93
18	10	5612  ± 1583	6332  ± 2310	89

Values are in mean ± SD.