Competitive binding dot blot assay using Aβ sequence-specific antibodies of (A) 6E10 recognizing Aβ1-16, (B) 4G8 recognizing Aβ17-22, (C) Anti-Aβ (22-35) recognizing Aβ22-35, and (D) 5C3 recognizing Aβ32-40 of Aβ monomers (top row), Aβ oligomers (middle row), and Aβ fibrils (bottom row) mixed with αS monomers (left column), αS oligomers (middle column), and αS fibrils (right column). M, O and F represent monomers, oligomers and fibrils, respectively.