Description
The AER-37 (CRA-1) monoclonal antibody specifically recognizes FcεRIα which is also known as the high affinity immunoglobulin epsilon receptor subunit alpha (Fc-epsilon RI-alpha). FcεRIα is a type I transmembrane glycoprotein that is encoded by FCER1A (Fc fragment of IgE receptor Ia) which belongs to the Ig gene superfamily. FcεRIα serves as the binding subunit for the Fc region of IgE. It forms part of a heterotetrameric, high-affinity IgE Fc receptor (FceR1/FcεR1) that includes signal transducing subunits, one β-chain (FcεRIβ encoded by MS4A2) and two disulfide-linked γ-subunits (FcεRIγ encoded by FCER1G). FcεRIα is normally expressed on basophils and mast cells and can also be expressed on some monocytes, Langerhans cells, dendritic cells, and eosinophils from allergic donors. FcεRIα plays a major role in allergic responses and in the presentation of allergens to the immune system. The AER-37 antibody reportedly does not compete with IgE for FceR1 binding.
BD™ CompBeads can be used as surrogates to assess fluorescence spillover (Compensation). When fluorochrome conjugated antibodies are bound to BD CompBeads, they have spectral properties very similar to cells. However, for some fluorochromes there can be small differences in spectral emissions compared to cells, resulting in spillover values that differ when compared to biological controls. It is strongly recommended that when using a reagent for the first time, users compare the spillover on cells and BD CompBead to ensure that BD CompBeads are appropriate for your specific cellular application. For optimal and reproducible results, BD Horizon Brilliant Stain Buffer should be used anytime two or more BD Horizon Brilliant dyes are used in the same experiment. Fluorescent dye interactions may cause staining artifacts which may affect data interpretation. The BD Horizon Brilliant Stain Buffer was designed to minimize these interactions. More information can be found in the Technical Data Sheet of the BD Horizon Brilliant Stain Buffer (Cat. No. 563794/566349) or the BD Horizon Brilliant Stain Buffer Plus (Cat. No. 566385). Note: When using high concentrations of antibody, background binding of this dye to erythroid cell subsets (mature erythrocytes and precursors) has been observed. For researchers studying these cell populations, or in cases where light scatter gating does not adequately exclude these cells from the analysis, this background may be an important factor to consider when selecting reagents for panel(s).
Store undiluted at 4°C and protected from prolonged exposure to light. Do not freeze. The monoclonal antibody was purified from tissue culture supernatant or ascites by affinity chromatography. The antibody was conjugated to the dye under optimum conditions that minimize unconjugated dye and antibody.
1. The production process underwent stringent testing and validation to assure that it generates a high-quality conjugate with consistent performance and specific binding activity. However, verification testing has not been performed on all conjugate lots.
2. Researchers should determine the optimal concentration of this reagent for their individual applications.
3. An isotype control should be used at the same concentration as the antibody of interest.
4. Caution: Sodium azide yields highly toxic hydrazoic acid under acidic conditions. Dilute azide compounds in running water before discarding to avoid accumulation of potentially explosive deposits in plumbing.
5. For fluorochrome spectra and suitable instrument settings, please refer to our Multicolor Flow Cytometry web page at www.bdbiosciences.com/colors.
6. Please refer to www.bdbiosciences.com/us/s/resources for technical protocols.
7. BD Horizon Brilliant Stain Buffer is covered by one or more of the following US patents: 8,110,673; 8,158,444; 8,575,303; 8,354,239.
8. Please refer to http://regdocs.bd.com to access safety data sheets (SDS).
9. CF™ is a trademark of Biotium, Inc.
10. BD Horizon Brilliant Ultraviolet 615 is covered by one or more of the following US patents: 8,110,673; 8,158,444; 8,227,187; 8,575,303; 8,354,239.
Specifications

General

SourceHuman IL-6Rα, amino acids (Leu20-Asp358) (Accession# NM_000565), was expressed in insect cells.
Molecular MassThe 339 amino acid recombinant protein has a predicted molecular mass of approximately 38.7 kD. The protein migrates at approximately 58 kD in DTT-reducing conditions and at 54 kD in non-reducing conditions by SDS-PAGE. The predicted N-terminal amino acid is Leu.
Purity>95%, as determined by Coomassie stained SDS-PAGE.
Formulation0.22 µm filtered protein solution is in PBS, pH 7.2
Endotoxin LevelLess than 0.01 ng per µg cytokine as determined by the LAL method.
Concentration10 and 25 µg sizes are bottled at 200 µg/mL. 100 µg size and larger sizes are lot-specific and bottled at the concentration indicated on the vial. To obtain lot-specific concentration and expiration, please enter the lot number in our Certificate of Analysis online tool.
Storage & HandlingUnopened vial can be stored between 2°C and 8°C for up to 2 weeks, at -20°C for up to six months, or at -70°C or colder until the expiration date. For maximum results, quick spin vial prior to opening. The protein can be aliquoted and stored at -20°C or colder. Stock solutions can also be prepared at 50 - 100 µg/mL in appropriate sterile buffer, carrier protein such as 0.2 - 1% BSA or HSA can be added when preparing the stock solution. Aliquots can be stored between 2°C and 8°C for up to one week and stored at -20°C or colder for up to 3 months. Avoid repeated freeze/thaw cycles.
ActivityED50 = 3.0 - 15 ng/ml, as determined by the ability of IL-6Rα to increase the growth arrest on mouse myeloid leukemia M1 cells induced by human IL-6 (20 ng/ml).
ApplicationBioassay
Application NotesBioLegend carrier-free recombinant proteins provided in liquid format are shipped on blue-ice. Our comparison testing data indicates that when handled and stored as recommended, the liquid format has equal or better stability and shelf-life compared to commercially available lyophilized proteins after reconstitution. Our liquid proteins are verified in-house to maintain activity after shipping on blue ice and are backed by our 100% satisfaction guarantee. If you have any concerns, contact us at [email protected].
Product CitationsSugawara E, et al. 2020. Autophagy. 1.323611111. PubMed
StructureMonomer, soluble receptor.
DistributionIL-6Rα is expressed in hepatocytes, neutrophils, macrophages, and lymphocytes. Soluble IL-6Rα is present in body fluids (urine and blood).
FunctionSoluble IL-6Rα plays a key role in IL-6 trans-signaling, which is a process that allows the response to IL-6 on cells that do not express IL-6Rα. It increases the polarization of Th17 by IL-6. It is produced by proteolysis by ADAM17. Its shedding is induced by PMA, IL-1β, TNF-α, and apoptosis.
InteractionEndothelial cells and a variety of cells expressing gp130.
Ligand/ReceptorIL-6 and sIL-6Rα/IL-6 complex bind cells expressing gp130.
BioactivityIL-6 promotes the growth arrest and differentiation of mouse myeloid leukemia M1 cells, and this effect is enhanced by sIL-6Rα.
Cell TypeHematopoietic stem and progenitors
Biology AreaCell Biology, Immunology, Innate Immunity, Neuroinflammation, Neuroscience, Signal Transduction, Stem Cells
Molecular FamilyCD Molecules, Cytokine/Chemokine Receptors, Soluble Receptors
Antigen References1. Jostock T, et al. 2001. Eur. J. Biochem. 1:160. 2. Saito T, et al. 1991. J. Immunol. 147:168. 3. Vermes C, et al. 2002. J. Biol. Chem. 277:16879. 4. Kamimura D, et al. 2003. Rev. Physiol. Biochem. Pharmacol. 149:1. 5. Matthews V, et al. 2003. J. Biol. Chem. 278:38829. 6. Chalaris A, et al. 2007. Blood 110:1748. 7. Le TT, et al. 2014. J Immunol. 7:3755.
Gene ID3570
UniProtView information about IL-6Ralpha on UniProt.org
Regulatory StatusRUO
Other NamesIL-6RA, CD126, IL6RA