Figure 2From: ELISA measurement of specific non-antigen-bound antibodies to Aβ1-42 monomer and soluble oligomers in sera from Alzheimer's disease, mild cognitively impaired, and noncognitively impaired subjects Transmission electron microscope (TEM) results. Typical TEM images are shown in Figures 2A and 2B for the Aβ1-42 monomer and oligomer preparations, respectively. The diameters of the spherical structures seen in the Aβ monomer and oligomer preparations were approximately 20 nm and 50-100 nm, respectively.Back to article page