Recombinant Human IGSF8/CD316 Fc Chimera Protein, CF

Catalog # Availability Size / Price Qty
Recombinant Human IGSF8/CD316 Fc Chimera Protein, CF Data
2 Images
Product Details

Recombinant Human IGSF8/CD316 Fc Chimera Protein, CF Summary

>95%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.
Endotoxin Level
<0.10 EU per 1 μg of the protein by the LAL method.
Measured by its binding ability in a functional ELISA. When Recombinant Human IGSF8/CD316 Fc Chimera is immobilized at 1 µg/mL (100 µL/well), Biotinylated Recombinant CD81 Fc Chimera binds with an ED50 of 1.2-7.2 μg/mL
Human embryonic kidney cell, HEK293-derived human IGSF8/CD316 protein
Human IGSF8
Accession # Q969P0-1
Accession #
N-terminal Sequence
Structure / Form
Disulfide-linked homodimer
Predicted Molecular Mass
85 kDa
86-113 kDa, reducing conditions

Product Datasheets

Carrier Free

What does CF mean?

CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.

What formulation is right for me?

In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.


Formulation Lyophilized from a 0.2 μm filtered solution in PBS.
Reconstitution Reconstitute at 500 μg/mL in PBS.
Shipping The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage:
  • 12 months from date of receipt, ≤ -20 °C as supplied.
  • 1 month, 2 to 8 °C under sterile conditions after reconstitution.
  • 3 months, ≤ -20 °C under sterile conditions after reconstitution.

Data Images

Binding Activity View Larger

When Recombinant Human IGSF8/CD316 Fc Chimera (Catalog # 1241-S8) is immobilized at 1 µg/mL (100 µL/well), Biotinylated Recombinant CD81 Fc Chimera binds with an ED50of 1.2-7.2 μg/mL.

SDS-PAGE View Larger

2 μg/lane of Recombinant Human IGSF8/CD316 Fc Chimera was resolved with SDS-PAGE under reducing (R) and non-reducing (NR) conditions and visualized by Coomassie® Blue staining, showing bands at 86-113 kDa and 170-230 kDa, respectively.

Reconstitution Calculator

Reconstitution Calculator

The reconstitution calculator allows you to quickly calculate the volume of a reagent to reconstitute your vial. Simply enter the mass of reagent and the target concentration and the calculator will determine the rest.


Background: IGSF8/CD316

IGSF8 (Immunoglobulin superfamily member 8), also known as EWI-2, KCT-4, LIR-D1, and PGRL, is a 75-kDa cell surface protein belonging to the immunoglobulin superfamily (1). IGSF8 is widely expressed, with pronounced mRNA expression in the brain and protein expression on peripheral blood lymphocytes and hepatocytes where it colocalizes with CD81 (1-3). It strongly associates with tetraspanins CD9 and CD81 which may act as physical linkers to form a complex with alpha 3 beta 1 integrin that may regulate cell aggregation and motility on laminin-5 (4). Human IGSF8 is synthesized as a 613 aa protein that includes a 27 aa signal peptide, a 552 aa extracellular domain (ECD), a 21 aa transmembrane segment, and a 13 aa cytoplasmic tail. Within the ECD, human IGSF8 shares 91% and 90% aa sequence identity with mouse and rat IGSF8, respectively. IGSF8 is an inducible receptor for Heat Shock Protein A8 (HSPA8) on activated dendritic cells (5). IGSF8 can interact with alpha -Actinin to regulate T cell immune synapses and HIV viral infection (6). In human glioma patients, low IGSF8 expression correlates with shorter survival time. Studies have shown that re-expression of IGSF8 in malignant glioblastoma cell lines inhibited glioblastoma colony formation in soft agar and caused diminished cell motility and invasion (7).

  1. Clark, K.L. et al. (2001) J. Immunol. 167:5115.
  2. Stipp, C.S. et al. (2001) J. Biol. Chem. 276:40545.
  3. Charrin, S. et al. (2003) Biochem. J. 373:409.
  4. Stipp, C.S. et al. (2003) J. Cell Biol. 163:1167.
  5. Kettner, S. et al. (2007) Mol Cell Biol. 27:7718.
  6. Gordón-Alonso, M. et al. (2012) J Immunol 189:689.
  7. Kolesnikova, T. et al. (2009) Neoplasia.11:77.
Long Name
Immunoglobulin Superfamily, Member 8
Entrez Gene IDs
93185 (Human); 140559 (Mouse)
Alternate Names
CD316 antigen; CD316; CD81P3; CD81P3LIR-D1; EWI2; EWI-2; EWI2CD81 partner 3; Glu-Trp-Ile EWI motif-containing protein 2; IGSF8; immunoglobulin superfamily, member 8; KCT4; KCT-4; Keratinocytes-associated transmembrane protein 4; PGRL; PGRLimmunoglobulin superfamily member 8


No product specific FAQs exist for this product, however you may

View all Proteins and Enzyme FAQs

Reviews for Recombinant Human IGSF8/CD316 Fc Chimera Protein, CF

There are currently no reviews for this product. Be the first to review Recombinant Human IGSF8/CD316 Fc Chimera Protein, CF and earn rewards!

Have you used Recombinant Human IGSF8/CD316 Fc Chimera Protein, CF?

Submit a review and receive an Amazon gift card.

$25/€18/£15/$25CAN/¥75 Yuan/¥1250 Yen for a review with an image

$10/€7/£6/$10 CAD/¥70 Yuan/¥1110 Yen for a review without an image

Submit a Review