Amyloid-beta precursor protein (APP) is an integral membrane protein expressed in many tissues and concentrated in the synapses of neurons. It functions as a cell surface receptor and has been implicated as a regulator of synapse formation, neural plasticity, antimicrobial activity, and iron export. It is coded for by the gene APP and regulated by substrate presentation. APP is best known as the precursor molecule whose proteolysis generates amyloid beta (Aβ), a polypeptide containing 37 to 49 amino acid residues, whose amyloid fibrillar form is the primary component of amyloid plaques found in the brains of Alzheimer's disease patients.
Background References
1. Ono K et al. Aggregation and structure of amyloid beta-protein. Neurochem Int. 2021 Dec
2. Yagi-Utsumi M et al. Conformational Variability of Amyloid-beta and the Morphological Diversity of Its Aggregates. Molecules. 2022 Jul
Immunohistochemical analysis of paraffin-embedded APP/PS1, 6-month mouse of AD brain tissue with Rabbit anti-beta Amyloid antibody (HA722962) at 1/1,000 dilution.
The section was pre-treated using heat mediated antigen retrieval with Tris-EDTA buffer (pH 9.0) for 20 minutes. The tissues were blocked in 1% BSA for 20 minutes at room temperature, washed with ddH2O and PBS, and then probed with the primary antibody (HA722962) at 1/1,000 dilution for 1 hour at room temperature. The detection was performed using an HRP conjugated compact polymer system. DAB was used as the chromogen. Tissues were counterstained with hematoxylin and mounted with DPX.
☑ Relative expression (RE)
Immunohistochemical analysis of paraffin-embedded mouse brain tissue (negative control) with Rabbit anti-beta Amyloid antibody (HA722962) at 1/200 dilution.
The section was pre-treated using heat mediated antigen retrieval with Tris-EDTA buffer (pH 9.0) for 20 minutes. The tissues were blocked in 1% BSA for 20 minutes at room temperature, washed with ddH2O and PBS, and then probed with the primary antibody (HA722962) at 1/200 dilution for 1 hour at room temperature. The detection was performed using an HRP conjugated compact polymer system. DAB was used as the chromogen. Tissues were counterstained with hematoxylin and mounted with DPX.
Immunofluorescence analysis of paraffin-embedded APP/PS1, 6-month mouse of AD brain tissue labeling beta Amyloid with Rabbit anti-beta Amyloid antibody (HA722962) at 1/50 dilution.
The section was pre-treated using heat mediated antigen retrieval with Tris-EDTA buffer (pH 9.0) for 20 minutes. The tissues were blocked in 10% negative goat serum for 1 hour at room temperature, washed with PBS, and then probed with the primary antibody (HA722962, green) at 1/50 dilution overnight at 4 ℃, washed with PBS. Goat Anti-Rabbit IgG H&L (iFluor™ 488, HA1121) was used as the secondary antibody at 1/1,000 dilution. Nuclei were counterstained with DAPI (blue).
☑ Relative expression (RE)
Immunofluorescence analysis of paraffin-embedded mouse brain tissue (negative control) labeling beta Amyloid with Rabbit anti-beta Amyloid antibody (HA722962) at 1/50 dilution.
The section was pre-treated using heat mediated antigen retrieval with Tris-EDTA buffer (pH 9.0) for 20 minutes. The tissues were blocked in 10% negative goat serum for 1 hour at room temperature, washed with PBS, and then probed with the primary antibody (HA722962, green) at 1/50 dilution overnight at 4 ℃, washed with PBS. Goat Anti-Rabbit IgG H&L (iFluor™ 488, HA1121) was used as the secondary antibody at 1/1,000 dilution. Nuclei were counterstained with DAPI (blue).
Dot blot analysis of beta Amyloid on different proteins with Rabbit anti-beta Amyloid antibody (HA722962) at 1/2,000 dilution. Goat Anti-Rabbit IgG - HRP Secondary Antibody (HA1001) at 1/50,000 dilution for 1 hour at room temperature.
Lane 1: Human Aβ37 full length peptide Lane 2: Human Aβ38 full length peptide Lane 3: Human Aβ39 full length peptide Lane 4: Human Aβ40 full length peptide Lane 5: Human Aβ41 full length peptide Lane 6: Human Aβ42 full length peptide Lane 7: Human Aβ43 full length peptide Lane 8: Mouse Aβ42 full length peptide
Proteins loading: 100ng, 50ng;
Blocking and dilution buffer: 5% NFDM/TBST;
Exposure time: 3 minutes; ECL: K1801.
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