Human/Mouse Phospho-APP/Protease Nexin II (T668) Antibody

Catalog #: MAB2508 Datasheet / COA / SDS

Catalog #	Availability	Size / Price	Qty
MAB2508
MAB2508-SP

APP/Protease Nexin II in Human Alzheimer's Disease Brain.

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Human/Mouse Phospho-APP/Protease Nexin II (T668) Antibody Summary

Species Reactivity

Human, Mouse

Specificity

Detects multiple isoforms of human and mouse APP phosphorylated at sites corresponding to T668 of the human APP695 isoform.

Source

Monoclonal Mouse IgG₁ Clone # 304904

Purification

Protein A or G purified from hybridoma culture supernatant

Immunogen

Phosphopeptide containing human APP T668 site

Formulation

Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied either lyophilized or as a 0.2 µm filtered solution in PBS.

Applications

Recommended Concentration

Sample

Western Blot

1 µg/mL

See below

Immunohistochemistry

8-25 µg/mL

See below

Please Note: Optimal dilutions should be determined by each laboratory for each application. General Protocols are available in the Technical Information section on our website.

Scientific Data

Immunohistochemistry

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APP/Protease Nexin II in Human Alzheimer's Disease Brain. APP/Protease Nexin II was detected in immersion fixed paraffin-embedded sections of human Alzheimer's disease brain (cortex) using 8 µg/mL Human/Mouse Phospho-APP/Protease Nexin II (T668) Monoclonal Antibody (Catalog # MAB2508) overnight at 4 °C. Tissue was stained with the Anti-Mouse HRP-DAB Cell & Tissue Staining Kit (brown; Catalog # CTS002) and counterstained with hematoxylin (blue). View our protocol for Chromogenic IHC Staining of Paraffin-embedded Tissue Sections.

Western Blot

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Detection of Human Phospho-APP/Protease Nexin II (T668) by Western Blot. Western blot shows lysates of HeLa human cervical epithelial carcinoma cell line untreated (-) or treated (+) with 1 µg/mL nocodazole for 16 hours. PVDF membrane was probed with 1 µg/mL of Human/Mouse Phospho-APP/Protease Nexin II (T668) Monoclonal Antibody (Catalog # MAB2508), followed by HRP-conjugated Anti-Mouse IgG Secondary Antibody (Catalog # HAF007). This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 1.

Reconstitution Calculator

Preparation and Storage

Reconstitution

Reconstitute at 0.5 mg/mL in sterile PBS.

Shipping

Lyophilized product is shipped at ambient temperature. Liquid small pack size (-SP) is shipped with polar packs. Upon receipt, store immediately at the temperature recommended below.

Stability & Storage

Use a manual defrost freezer and avoid repeated freeze-thaw cycles.

12 months from date of receipt, -20 to -70 °C as supplied.
1 month, 2 to 8 °C under sterile conditions after reconstitution.
6 months, -20 to -70 °C under sterile conditions after reconstitution.

Background: APP

Amyloid precursor protein (APP) is a type I membrane protein with several human isoforms due to alternative splicing. APP-770, -751, and -733 contain a Kunitz protease inhibitor (KPI) domain (residue 291 - 342) and APP-695 does not. APP is a cell surface molecule with many functions. It can be processed proteolytically in two different pathways. In one pathway, beta - and gamma -secretase cleave at the beta site between residue 670 and 671 and the gamma site between residue 711 and 714 to produce beta ‑amyloid peptide (A beta 40 and A beta 42), a major component in plaques found in brains of patients with Alzheimer's disease (1). The other pathway involves alpha -secretase that cleaves residues between 687 and 688. It is antiamyloidogenic due to its benign character and the prevention of the A beta peptide formation (2). Soluble APP containing the KPI domain, also referred to as protease nexin II, is a potent inhibitor of serine proteases and may have additional functions. For example, it may regulate the contact face of blood coagulation and limit thrombosis specially in brain due to its localization and coagulation factor XI inhibiting activity (3, 4).

References

Haass, C. (2004) EMBO J. 23:483.
Lichtenthaler, S. F. and C. Haass (2004) J. Clin. Invest. 113:1384.
Badellino, K.O. and P.N. Walsh (2000) Biochemistry 39:4769.
Xu, F. et al. (2005) Proc. Natl. Acad. Sci USA. 102:18135.

Long Name

Amyloid Precursor Protein

Entrez Gene IDs

351 (Human); 11820 (Mouse)

Alternate Names

amyloid beta (A4) precursor protein-binding, family B, member 2; amyloid beta A4 precursor protein-binding family B member 2; Amyloid beta precursor protein; Amyloid beta; APP; beta Amyloid; Protease Nexin II