Application

Research Sub CategoryNeurodegenerative Diseases

Research CategoryNeuroscience

Anti-APP A4 Antibody, a.a. 66-81 of APP {NT}, clone 22C11, Alexa Fluor^® 555 is an antibody against APP A4 for use in Immunocytochemistry.

The unconjugated antibody (Cat. No. MAB348) is shown to be suitable also for immunohistochemistry (for both frozen and paraffin-embedded sections), immunofluorescence, and Western blotting applications.

Disclaimer

Unless otherwise stated in our catalog or other company documentation accompanying the product(s), our products are intended for research use only and are not to be used for any other purpose, which includes but is not limited to, unauthorized commercial uses, in vitro diagnostic uses, ex vivo or in vivo therapeutic uses or any type of consumption or application to humans or animals.

General description

Amyloid beta A4 protein (UniProt P05067; also known as ABPP, Alzheimer disease amyloid protein, Amyloid precursor protein, APP, APPI, Cerebral vascular amyloid peptide, CVAP, PN-II, PreA4, Protease nexin-II) is encoded by the APP (also known as A4, AD1) gene (Gene ID 351) in human. Amyloid precursor protein (APP) is initially produced with a signal peptide sequence (a.a. 1-17), the removal of which yields the mature protein with a large extracellular portion (a.a. 18-699), followed by a transmembrane segment (a.a. 700-723) and a cytoplasmic (a.a. 724-770) tail. APP can be further processed by the α-, β-, and γ-secretases in two alternative processing pathways. In the non-amyloidogenic pathway, APP is first cleaved by the plasma membrane-localized α-secretase to generate an N-terminal extracellular sAPPα fragment (a.a. 18-687) and a membrane-bound C-terminal fragment C83 (CTFα), which can be further cleaved by γ-secretase to produce a non-toxic small peptide p3 and a cytoplasmic APP intracellular domain (AICD). In the amyloidogenic pathway, APP undergoes β-cleavage in BACE-1 (β-site APP-cleaving enzyme)-enriched endosomes to generate an N-terminal extracellular sAPPβ fragment (a.a. 18-671) and a membrane-bound C-terminal fragment C99 (CTFβ). Subsequent cleavage of C99 by γ-secretase releases the amyloid β peptide (Aβ) and AICD. Aβ accumulation in the cortical and hippocampal regions of the brain is a major pathological feature of Alzheimer′s disease (AD).

Immunogen

Epitope: Amino acids 66-81 of APP.

Purified recombinant Alzheimer precursor A4 (pre-A4695) fusion protein.

Legal Information

ALEXA FLUOR is a registered trademark of Life Technologies

Other Notes

Concentration: Please refer to lot specific datasheet.

Physical form

Protein A purified

Purified mouse monoclonal IgG1 antibody conjugate in PBS with 15 mg/mL BSA and 0.1 % sodium azide.

Quality

Evaluated by Immunocytochemistry in SH-5YSY cells.

Immunocytochemistry Analysis: A 1:100 dilution of this antibody detected APP A4 in SH-5YSY cells.

Specificity

Clone 22C11 reacts with pre-A4. The antibody recognizes amino acids 66-81 of the N-terminus on the pre-A4 molecule (Hilbich, C., et al. (1993). J. Biol. Chem. 268(35):26571-26577). Clone 22C11 recognizes all three isoforms of APP, immature ~110kDa, sAPP ~120kDa, and mature ~130kDa (Hoffmann, J., et al. (2000). Eur. J. Cell. Biol.79(12):905-914.). The antibody is known to cross react with APLP2 (Slunt, H.H., et al. (1994). J. Biol. Chem. 269(4):2637-2644).

Storage and Stability

Stable for 1 year at 2-8°C from date of receipt.

Target description

~110/120/130 kDa observed.