Napsin A Antibody

• Catalog Number: orb749887
• Category: Antibodies
• Description: Napsin is a pepsin-like aspartic proteinase connected with maturation of surfactant protein B. There are two closely related napsins, napsin A and napsin B. Napsin A is expressed as a single chain protein. Immunohistochemical studies revealed high expression levels of napsin A in human lung and kidney but low expression in spleen. Napsin A is expressed in type II pneumocytes and in adenocarcinomas of lung. The high specificity expression of napsin A in adenocarcinomas of lung is useful to distinguish primary lung adenocarcinomas from adenocarcinomas of other organs.
• Species/Host: Mouse
• Clonality: Monoclonal
• Clone Number: NAPSA/1238
• Tested applications: IHC-P, WB
• Reactivity: Human
• Isotype: Mouse IgG1, kappa
• Immunogen: A recombinant fragment corresponding to amino acids 189-299 from the human protein was used as the immunogen for the Napsin A antibody.
• Antibody Type: Primary Antibody
• Dilution range: Western blot: 1-2ug/ml,Immunohistochemistry (FFPE): 1-2ug/ml for 30 min at RT
• Purity: Protein G affinity chromatography
• Conjugation: Unconjugated
• Formula: 0.2 mg/ml in 1X PBS with 0.1 mg/ml BSA (US sourced) and 0.05% sodium azide
• Hazard Information: This Napsin A antibody is available for research use only.
• UniProt ID: O96009
• Storage: Store the Napsin A antibody at 2-8°C (with azide) or aliquot and store at -20°C or colder (without azide).
• Buffer/Preservatives: 0.2 mg/ml in 1X PBS with 0.1 mg/ml rAlbumin (US sourced) and 0.05% sodium azide
• Note: For research use only
• Application notes: Optimal dilution of the Napsin A antibody should be determined by the researcher.1. Staining of formalin-fixed tissues requires boiling tissue sections in pH 9 10mM Tris with 1mM EDTA for 10-20 min followed by cooling at RT for 20 min.2. The prediluted format is supplied in a dropper bottle and is optimized for use in IHC. After epitope retrieval step (if required), drip mAb solution onto the tissue section and incubate at RT for 30 min.
• Expiration Date: 12 months from date of receipt.

Western blot of human 1) K562, 2) HEK293 and 3) A549 cell lysates using Napsin-A antibody (clone NAPSA/1238). Predicted molecular weight ~45 kDa.

IHC: Formalin-fixed, paraffin-embedded human lung Adenocarcinoma stained with Napsin-A antibody (clone NAPSA/1238).

Analysis of HuProt (TM) microarray containing more than 19, 000 full-length human proteins using Napsin A antibody (clone NAPSA/1238). These results demonstrate the foremost specificity of the NAPSA/1238 mAb. Z- and S- score: The Z-score represents the strength of a signal that an antibody (in combination with a fluorescently-tagged anti-IgG secondary Ab) produces when binding to a particular protein on the HuProt (TM) array. Z-scores are described in units of standard deviations (SD's) above the mean value of all signals generated on that array. If the targets on the HuProt (TM) are arranged in descending order of the Z-score, the S-score is the difference (also in units of SD's) between the Z-scores. The S-score therefore represents the relative target specificity of an Ab to its intended target.

SDS-PAGE analysis of purified, BSA-free Napsin A antibody (clone NAPSA/1238) as confirmation of integrity and purity.