Western blot. All lanes: Amyloid beta A4 antibody at 1µg/ml. Lane 1: Mouse heart tissue. Lane 2: Mouse kidney tissue. Lane 3: Mouse lung tissue. Secondary. Goat polyclonal to Mouse IgG at 1/15000 dilution. Predicted band size: 30, 35, 72, 80 kDa. Observed band size: 30, 35, 72 kDa.