Human IGSF3 Alexa Fluor® 700-conjugated Antibody

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Human IGSF3 Alexa Fluor® 700-conjugated Antibody Summary

Species Reactivity
Detects human IGSF3 in direct ELISAs. In direct ELISAs, no cross-reactivity with recombinant human (rh) IGSF4, 4B, 4C, 4D or 8 is observed.
Monoclonal Mouse IgG1 Clone # 503621
Mouse myeloma cell line NS0-derived recombinant human IGSF3
Accession # AAI44133
Supplied 0.2 mg/mL in a saline solution containing BSA and Sodium Azide.
Alexa Fluor 700 (Excitation= 675-700 nm, Emission= 723 nm)


Recommended Concentration
Flow Cytometry
0.25-1 µg/106 cells
A549 human lung carcinoma cell line

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.

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Preparation and Storage

The product is shipped with polar packs. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage
Store the unopened product at 2 - 8 °C. Do not use past expiration date.

Background: IGSF3

IGSF3 (Immunoglobulin superfamily member 3; also EWI-3) is a 133 kDa (predicted) member of the EWI subfamily of the Ig-Superfamily of molecules. It is reported to be widely expressed, with concentration in placenta and lung. Human IGSF3 an 1194 amino acid (aa) type I transmembrane protein that contains a 19 aa signal sequence followed by a 1175 aa mature region (aa 20-1194). The molecule's extracellular region is 1105 aa in length (aa 20-1124), and contains eight C2-type Ig-like domains (aa 22-1097). This region also possesses at least two utilized phosphorylation sites at Thr617and Ser625, plus an EWI motif in the second Ig-like domain. IGSF3 likely exists as a disulfide-linked homodimer. There are two potential isoform variants. One contains a 20 aa insertion after Pro406, while another shows the same insert coupled to a premature truncation after Pro833. Over aa 20‑1125, human IGSF3 shares 92% aa identity with mouse IGSF3.

Long Name
Immunoglobulin Superfamily, Member 3
Entrez Gene IDs
3321 (Human); 78908 (Mouse); 295325 (Rat)
Alternate Names
EWI-3; glu-Trp-Ile EWI motif-containing protein 3; IGSF3; immunoglobulin superfamily, member 3; member 3; V8

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Product Specific Notices

This product is provided under an agreement between Life Technologies Corporation and R&D Systems, Inc, and the manufacture, use, sale or import of this product is subject to one or more US patents and corresponding non-US equivalents, owned by Life Technologies Corporation and its affiliates. The purchase of this product conveys to the buyer the non-transferable right to use the purchased amount of the product and components of the product only in research conducted by the buyer (whether the buyer is an academic or for-profit entity). The sale of this product is expressly conditioned on the buyer not using the product or its components (1) in manufacturing; (2) to provide a service, information, or data to an unaffiliated third party for payment; (3) for therapeutic, diagnostic or prophylactic purposes; (4) to resell, sell, or otherwise transfer this product or its components to any third party, or for any other commercial purpose. Life Technologies Corporation will not assert a claim against the buyer of the infringement of the above patents based on the manufacture, use or sale of a commercial product developed in research by the buyer in which this product or its components was employed, provided that neither this product nor any of its components was used in the manufacture of such product. For information on purchasing a license to this product for purposes other than research, contact Life Technologies Corporation, Cell Analysis Business Unit, Business Development, 29851 Willow Creek Road, Eugene, OR 97402, Tel: (541) 465-8300. Fax: (541) 335-0354.


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