Fig. 3From: Presenilin 1 transgene addition to amyloid precursor protein overexpressing transgenic rats increases amyloid beta 42 levels and results in loss of memory retentionSerum Aβ42 (A, D), Aβ40 (B, E) and Aβ42/Aβ40 (C, F) levels of 30 day old F1 and 50 day old F2 generations. Different letters above each bar indicate significantly different levels of Aβ42 and Aβ42/Aβ40 Back to article page