Biolegend, 303438, Ultra-LEAF™ Purified anti-human CD33 Antibody, 1mg

CD33 is a 67 kD type I transmembrane glycoprotein also known as Siglec-3, gp67, and p67. It is a sialoadhesion immunoglobulin superfamily member expressed on myeloid progenitors, monocytes, granulocytes, dendritic cells and mast cells. CD33 is absent on normal platelets, lymphocytes, erythrocytes and hematopoietic stem cells. CD33 functions as a sialic acid-dependent cell adhesion molecule with carbohydrate/lectin binding activity.
1mg
Verified Reactivity: Human
Reported Reactivity: Chimpanzee
Antibody Type: Monoclonal
Host Species: Mouse
Immunogen: Human myeloid leukaemia cells.
Formulation: 0.2 µm filtered in phosphate-buffered solution, pH 7.2, containing no preservative.
Endotoxin Level: Less than 0.01 EU/µg of the protein (< 0.001 ng/µg of the protein) as determined by the LAL test.
Preparation: The Ultra-LEAF™ (Low Endotoxin, Azide-Free) antibody was purified by affinity chromatography.
Concentration: The antibody is bottled at the concentration indicated on the vial, typically between 2 mg/mL and 3 mg/mL. Older lots may have also been bottled at 1 mg/mL. To obtain lot-specific concentration and expiration, please enter the lot number in our Certificate of Analysis online tool.
Storage & Handling: The antibody solution should be stored undiluted between 2°C and 8°C. This Ultra-LEAF™ solution contains no preservative; handle under aseptic conditions.
Application: FC - Quality testedCyTOF® - VerifiedICC, IP, WB - Reported in the literature, not verified in house
Recommended Usage: Each lot of this antibody is quality control tested by immunofluorescent staining with flow cytometric analysis. For flow cytometric staining, the suggested use of this reagent is ≤ 2.0 µg per million cells in 100 µl volume or 100 µl of whole blood. It is recommended that the reagent be titrated for optimal performance for each application.
Application Notes: Additional reported applications (for the relevant formats) include: immunoprecipitation, Western blotting3, induction of cytokine production3, and immunofluorescence4. The Ultra-LEAF™ purified antibody (Endotoxin < 0.01 EU/µg, Azide-Free, 0.2 µm filtered) is recommended for functional assays (Cat. Nos. 303437 & 303438).
Application References(PubMed link indicates BioLegend citation): Knapp W, et al. 1989. Leucocyte Typing IV. Oxford University Press. New York. Favaloro E, et al. 1988. Br. J. Haematol. 69:163. Garnache-Ottou F, et al. 2005. Blood 105:1256. (WB) Pèrez-Oliva AB, et al. 2011. Glycobiology. 21:757. (epitope, FC, IF)
RRID: AB_2814130 (BioLegend Cat. No. 303437) AB_2814131 (BioLegend Cat. No. 303438)
Structure: Ig superfamily, sialoadhesins, type I glycoprotein, 67 kD
Distribution: Myeloid progenitor, monocytes, granulocytes, dendritic cells, mast cells
Function: Adhesion and lectin activity
Ligand/Receptor: Sugar chains containing sialic acid
Cell Type: B cells, Dendritic cells, Granulocytes, Hematopoietic stem and progenitors, Mast cells, Monocytes, Neutrophils
Biology Area: Cell Biology, Immunology, Neuroinflammation, Neuroscience
Molecular Family: CD Molecules, Siglec Molecules
Antigen References: 1. Favaloro E, et al. 1988. Br. J. Haematol. 69:163. 2. Freeman S, et al. 1995. Blood 85:2005.
Gene ID: 945
UniProt: View information about CD33 on UniProt.org
Clone: WM53
Regulatory Status: RUO
Workshop: IV M-505
Other Names: Siglec-3, gp67, p67
Isotype: Mouse IgG1, κ
Q: Do you guarantee that your antibodies are totally pathogen free?
A: BioLegend does not test for pathogens in-house aside from the GoInVivo™ product line. However, upon request, this can be tested on a custom basis with an outside, independent laboratory.
Q: Does BioLegend test each Ultra-LEAF™ antibody by functional assay?
A: No, BioLegend does not test Ultra-LEAF™ antibodies by functional assays unless otherwise indicated. Due to the possible complexities and variations of uses of biofunctional antibodies in different assays and because of the large product portfolio, BioLegend does not currently perform functional assays as a routine QC for the antibodies. However, we do provide references in which the antibodies were used for functional assays and we do perform QC to verify the specificity and quality of the antibody based on our strict specification criteria.
Q: Does BioLegend test each Ultra-LEAF™ antibody for potential pathogens?
A: No, BioLegend does not test for pathogens in-house unless otherwise indicated.  However, we can recommend an outside vendor to perform this testing as needed.
Q: Have you tested this Ultra-LEAF™ antibody for in vivo or in vitro applications?
A: We don't test our antibodies for in vivo or in vitro applications unless otherwise indicated. Depending on the product, the TDS may describe literature supporting usage of a particular product for bioassay. It may be best to further consult the literature to find clone specific information.