Figure 3

Lack of amyloid deposition in 15-month-old E22ΔAβ mice. (a–d) Immunostaining with antibody 6E10 reveals a complete absence of extracellular amyloid deposits in 15-month-old E22ΔAβ mice (a: cortex; b: hippocampus). In contrast, arcAβ mice show a massive extracellular amyloid deposition at that age (c: cortex; d: hippocampus). Scale bars: 250 μm (a–d). Aβ, amyloid β.