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贝克曼MONOCLONAL ANTIBODY CD16 Freeze-dried IM0813MONOCLONAL ANTIBODY CD16 Freeze-dried Reagent Table
Freeze-dried - 0.2 mg Analyte Specific Reagent. Analytical and performance characteristics are not established REAGENTS See Table WARNING AND PRECAUTIONS 1. Specimens, samples and all material coming in contact with them should be considered potentially infectious and disposed of with proper precautions. 2. Never pipet by mouth and avoid contact of samples with skin and mucous membranes. 3. Do not use antibody beyond the expiration date on the label. 4. Avoid microbial contamination of reagents or incorrect results might occur. 5. Use good laboratory practices when handling this reagent. 6. Any change in the physical appearance of the reagents may indicate deterioration and the reagent should not be used. GHS HAZARD CLASSIFICATION Not classified as hazardous
STORAGE AND HANDLING CONDITIONS AND STABILITY This reagent is stable up to the expiration date when stored at 2 – 8°C. Do not freeze. This monoclonal antibody is provided in freeze-dried form and must be reconstituted with 1 mL of distilled water. Bring reagent to 18 – 25°C prior to use. SPECIFICITY The CD16 antigen is the low-affinity receptor for IgG (FcγRIII) that binds immune complexes, but not monomeric IgG. The CD16 antigen exists in two different forms encoded by two different genes: FcγRIIIA (or III-2) and FcγRIIIB (or III-1). The genetic heterogeneity of CD16 generates alternative membrane-anchored molecules. One is a transmembrane form (FcγRIIIA, 50 – 65 kDa) expressed on NK cells, monocytes and macrophages. The other is a glycosylphosphatidylinositol (GPI)-anchored form (FcγRIIIB, 48 kDa) only expressed on neutrophils (1,2).
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It has been shown that the CD16 antigen can be non-covalently associated within the membrane of NK cells, to the 16 kDa CD3ζ chain (3), or to the dimeric FcRγ chain (4). The 3G8 monoclonal antibody (mAb) binds to the FcγRIIIA as well as the FcγRIIIB (strongly). It was shown to block almost completely the binding of IgG dimers to FcγRIIIB (5). Experiments, where amino acid mutations were done on the FcγRIIIB molecule, showed that the 3G8 mAb is affected by Lys162 and Val164 substitutions in the FG loop of the membrane-proximal Ig-like domain of the molecule (6). The 3G8 mAb was assigned to CD16 during the fifth HLDA workshop on Human Leucocyte Differentiation Antigens, held in Boston, USA, in 1993 (7). TRADEMARKS Beckman Coulter, the stylized logo, and the Beckman Coulter product and service marks mentioned herein are trademarks or registered trademarks of Beckman Coulter, Inc. in the United States and other countries. ADDITIONAL INFORMATION For additional information, or if damaged product is received, call Beckman Coulter Customer Service at 800-526-7694 (USA or Canada) or contact your local Beckman Coulter Representative. Symbols Key Glossary of Symbols is available at beckman.com/techdocs (document number B60062)
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