Description
Gangliosides are sialic-acid bearing glycolipids that are expressed on the surface of all mammalian cells, and are likely involved in mediating cell-substratum interactions. They are important target antigens for antibody dependent cellular cytotoxicity (ADCC) of human melanoma and neuroblastoma cells. Human melanoma cells produce gangliosides, designated as GD2 and GD3 which are deposited in the subtratum-attached material, and may play a significant role in the melanoma metastatic phenotype. Clone 14.G2a specifically reacts with human and mouse GD2 ganglioside. LAN-1 human neuroblastoma cells were used as immunogen. Clone 14.G2a is an isotype switch variant selected from the parental IgG3-producing hybridoma 14.18 and has identical reactivity as the parental antibody. Clone 14.G2a is routinely tested by flow cytometry using M21 human melanoma cells.
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® CompBeads 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 BD Horizon Brilliant™ dyes are used in a multicolor flow cytometry panel. Fluorescent dye interactions may cause staining artifacts which may affect data interpretation. The BD Horizon Brilliant Stain Buffer was designed to minimize these interactions. When BD Horizon Brilliant Stain Buffer is used in in the multicolor panel, it should also be used in the corresponding compensation controls for all dyes to achieve the most accurate compensation. For the most accurate compensation, compensation controls created with either cells or beads should be exposed to BD Horizon Brilliant Stain Buffer for the same length of time as the corresponding multicolor panel. 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).
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. Please refer to www.bdbiosciences.com/us/s/resources for technical protocols.
2. 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.
3. For fluorochrome spectra and suitable instrument settings, please refer to our Multicolor Flow Cytometry web page at www.bdbiosciences.com/colors.
4. CF™ is a trademark of Biotium, Inc.
5. 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.
6. BD Horizon Brilliant Ultraviolet 563 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.
7. Please refer to http://regdocs.bd.com to access safety data sheets (SDS).
8. Since applications vary, each investigator should titrate the reagent to obtain optimal results.
9. Human donor specific background has been observed in relation to the presence of anti-polyethylene glycol (PEG) antibodies, developed as a result of certain vaccines containing PEG, including some COVID-19 vaccines. We recommend use of BD Horizon Brilliant™ Stain Buffer in your experiments to help mitigate potential background. For more information visit https://www.bdbiosciences.com/en-us/support/product-notices.
10. Researchers should determine the optimal concentration of this reagent for their individual applications.
11. 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.
Specifications

General

SourceHuman Serpin A12 (Vaspin), amino acids (Leu20-Lys414) (Accession# R78211), was expressed in 293E cells with a C-terminal His-tag.
Molecular MassThe 410 amino acid recombinant protein has a predicted molecular mass of approximately 47 kD. The protein migrates at approximately 60 kD and 65 kD in both DTT-reducing and non-reducing conditions by SDS-PAGE respectively.
Purity>95%, as determined by Coomassie stained SDS-PAGE.
Formulation0.22 µm filtered protein solution is in 20 mM Tris, 0.3 M NaCl, pH 7.5.
Endotoxin LevelLess than 0.1 EU per µg of protein 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.
ActivityHuman Serpin A12 (Vaspin) inhibits the peptidase activity of human KLK7 with an IC50 value lower than 60 nM.
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].
StructureMonomer.
DistributionExpressed in visceral adipose tissues. Possibly present in adipocytes. Present in the plasma and serum.
FunctionAdipokines that modulate insulin action by specifically inhibiting target protease KLK7 in white adipose tissues.
Ligand/ReceptorKLK7, GRP78/VDAC complex.
BioactivityHuman Serpin A12 (Vaspin) activity is measured by its ability to inhibit the peptidase activity of human KLK7.
Biology AreaNeuroscience, Stem Cells
Molecular FamilyEnzymes and Regulators
Antigen References1. Li HL, et al. 2011. Clin. Chem. Lab Med. 49:1547. 2. Jung CH, et al. 2011. Biochem. Biophys. Res. Commun. 413:264. 3. Li H, et al. 2013. Atherosclerosis 228:61. 4. Nakatsuka A, et al. 2012. Diabetes 61:2823. 5. Heiker JT, et al. 2013. Cell Mol. Life Sci. 70:2569. 6. Hida K, et al. 2005. Proc. Natl. Acad. Sci. USA 30:10610. 7. Jian W, et al. 2014. PLoS One 9:e94763.
Gene ID145264
UniProtView information about Serpin A12 on UniProt.org
Regulatory StatusRUO
Other NamesVaspin