Description
The L60 monoclonal antibody specifically binds to CD43 which is also known as Leukosialin (LSN) or Galactoglycoprotein (GALGP). CD43 is a ~95-135 kDa heavily O-sialylated type I transmembrane glycoprotein that is encoded by SPN (sialophorin) and belongs to the cell surface mucin family. The L60 antibody recognizes a sialic acid-dependent determinant on CD43. CD43 is highly expressed on T lymphocytes, thymocytes, monocytes, granulocytes, bone marrow stem cells, pre-B cells and activated B cells plasma cells but not on resting peripheral blood B cells, red blood cells, and non-hematopoietic cells. CD43 is enzymatically shed from leucocyte surfaces following activation by various stimuli. CD43 appears to be involved in mediating intercellular interactions that regulate leucocyte functions.
For optimal and reproducible results, BD Horizon Brilliant Stain Buffer should be used anytime two or more BD Horizon Brilliant dyes (including BD OptiBuild Brilliant reagents) 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).
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 with BD Horizon BUV661 under optimal conditions that minimize unconjugated dye and antibody.
1. This antibody was developed for use in flow cytometry.
2. 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.
3. Researchers should determine the optimal concentration of this reagent for their individual applications.
4. An isotype control should be used at the same concentration as the antibody of interest.
5. 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.
6. For fluorochrome spectra and suitable instrument settings, please refer to our Multicolor Flow Cytometry web page at www.bdbiosciences.com/colors.
7. Please refer to www.bdbiosciences.com/us/s/resources for technical protocols.
8. 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.
9. BD Horizon Brilliant Ultraviolet 661 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 IGFBP-4, amino acids (Asp22-Glu258) (Accession# AAA62670), was expressed in 293E cells. The amino-terminal possesses a 9His-tag.
Molecular MassThe 259 amino acid recombinant protein has a predicted molecular mass of approximately 28 kD. The DTT-reduced and non-reduced protein migrates approximately at 35 - 40 and 33 - 38 kD by SDS-PAGE respectively. The predicted N-terminal amino acid is His.
Purity>90%, 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 = 15 - 90 ng/ml as determined by the inhibition of MCF-7 cell proliferation induced by human IGF-II (18 ng/ml, Cat No. 590604).
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].
DistributionIt is expressed in a variety of tissues and cells such as embryonic and postnatal brain, human osteoblast-like cells, skin fibroblasts, endothelial cells, epithelial cells, intestinal epithelium, and in a variety of tumor cells.
FunctionIGFBP-4 inhibits the action of IGFI and II by preventing their binding to their receptors. The binding affinity of IGFBP-4 for IGFs is regulated by proteolysis through PAPP-A.
Ligand/ReceptorIGF-I and IGF-II.
BioactivityIGFBP-4 inhibits the proliferation of MCF-7 cells induced by IGF-II (18 ng/ml).
Cell TypeHematopoietic stem and progenitors, Mesenchymal Stem Cells
Biology AreaAngiogenesis, Cancer Biomarkers, Cell Biology, Cell Proliferation and Viability, Stem Cells
Antigen References1. Shimasaki S, et al. 1990. Molecular Endocrinol. 4:1451. 2. Boldt HB, et al. 2001. Biochem. J. 358:359. 3. Bunn RC and Fowlkes JL. 2003. Trends Endocrinol. Metab. 14:176. 4. Ning Y, et al. 2008. Mol. Endocrinol. 22:1213. 5. Moreno MJ, et al. 2013. Neoplasia. 5:554. 6. Contois LW, et al. 2012. J. Biol. Chem. 287:1779. 7. Shi Z, et al. 2013. Am. J. Physiol. Gastrointest. Liver Physiol. 305:G74.
Gene ID3487
UniProtView information about IGFBP-4 on UniProt.org
Regulatory StatusRUO
Other NamesIBP4, BP-4, HT29-IGFBP, IGFBP4