Recombinant Human LAIR2 His-tag Avi-tag Protein, CF Summary
Accession # Q6ISS4-1
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.
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 with Trehalose.|
|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:||Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
When Bovine Collagen I is coated at 10 µg/mL, 100 μL/well,Recombinant Human LAIR2 His-tag Avi-tag (Catalog # AVI2665) binds with anED50 of 0.75-6 ng/mL.
2 μg/lane of Biotinylated Recombinant Human LAIR2 His-Tag Avi-tag (Catalog # AVI2665)was resolved with SDS-PAGE under reducing (R) and non-reducing (NR) conditionsand visualized by Coomassie® Bluestaining, showing bands at 20-28 kDa.
LAIR2 (leukocyte-associated Ig-like receptor-2; CD306) is a secreted, 131 amino acid (aa) protein that contains one Ig-like C2 type domain, making it a member of the Ig superfamily. When compared to LAIR1, its transmembrane counterpart, LAIR2 shares 83% aa identity across the signal sequence and extracellular domains (1-3). Although one is secreted and the other is membrane-bound, the two LAIR proteins are thought to have arisen from a common gene ancestor and appear to share similar adhesion profiles. This suggests that LAIR2 may compete with LAIR1 for ligand binding (3, 4). A 114 aa alternate splice form of LAIR-2 is truncated at the C-terminus, but retains the entire Ig domain (1-3). The expression profile of these splice forms, and the presence of orthologs in other species, have not been reported. LAIR2 is a soluble collagen-receptor, and it can be detected in the synovial fluid of rheumatoid arthritis patients, urine of pregnant women, and as well as primary cells (5, 6). In vitro studies have demonstrated LAIR2 can compete with LAIR1 for the same collagen binding site and suggesting LAIR2 may play an important role in immune cell activation (5, 6). LAIR2 can interact with complement component 1q (C1q) and mannose-binding lectin (MBL) and act as a complement inhibitor for the treatment and prevention of antibody-mediated allograft rejection and antibody-mediated clinical conditions (7).
- Meyaard, L. (2003) J. Biol. Regul. Homeost. Agents 17:330.
- Meyaard, L. et al. (1999) J. Immunol. 162:5800.
- Meyaard, L. et al. (1997) Immunity 7:283.
- Xu, X.G. et al. (2005) Xi Bao Yu Fen Zi Mian Yi Xue Za Zhi. 21:553.
- Lebbink, R.J. et al. (2008) J. Immunol. 180:1662.
- Olde Nordkamp, M.J. et al. (2011) Arthritis Rheum. 63:3749.
- Olde Nordkamp, M.J. et al. (2014) J. Innate Immun. 6:284.
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