Description
The HMFG2 (Milk Fat Globule 2) monoclonal antibody, formerly known as clone 3.14.A3, specifically binds to Mucin-1 (MUC1) which is also known as CD227, Episialin, Breast carcinoma-associated antigen DF3, Cancer antigen 15-3, H23 antigen, Peanut reactive urinary protein (PUM), Polymorphic epithelial mucin (PEM), or Epithelial membrane antigen (EMA). MUC1 (CD227) is a heterodimeric cell surface glycoprotein that belongs to the epithelial mucin family. As a result of proteolytic cleavage, MUC1 (CD227) is comprised of a large, extracellular N-terminal alpha subunit that contains a domain of 20 amino-acid tandem repeats and functions in cellular adhesion. The smaller transmembrane C-terminal beta subunit contains a cytoplasmic domain that is involved in cell signaling. MUC1 (CD227) is variably expressed on the surfaces of normal and malignant glandular and ductal epithelial cells, myeloma cells, and some hematopoietic cell lineages including subsets of T cells, B cells, monocytes and dendritic cells. Soluble forms of MUC1 (CD227) may arise by shedding from the cell surface or by secretion of forms derived from alternative RNA splicing. MUC1 (CD227) plays roles in the provision of protective barrier function, the regulation of cellular adhesion and migration, and the transduction of multiple signal pathways. The HMFG2 antibody recognizes epitopes within the tandem repeat domain of MUC1 (CD227).
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.
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. When using high concentrations of antibody, background binding of this dye to erythroid fragments produced by ammonium chloride-based lysis, such as with BD Pharm Lyse™ Lysing Buffer (Cat. No. 555899), has been observed when the antibody conjugate was present during the lysis procedure. This may cause nonspecific staining of target cells, such as leukocytes, which have bound the resulting erythroid fragments. This background can be mitigated by any of the following: titrating the antibody conjugate to a lower concentration, fixing samples with formaldehyde, or removing erythrocytes before staining (eg, gradient centrifugation or pre-lysis with wash). This background has not been observed when cells were lysed with BD FACS™ Lysing Solution (Cat. No. 349202) after staining.
2. Please refer to www.bdbiosciences.com/us/s/resources for technical protocols.
3. Please observe the following precautions: Absorption of visible light can significantly alter the energy transfer occurring in any tandem fluorochrome conjugate; therefore, we recommend that special precautions be taken (such as wrapping vials, tubes, or racks in aluminum foil) to prevent exposure of conjugated reagents, including cells stained with those reagents, to room illumination.
4. 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.
5. For fluorochrome spectra and suitable instrument settings, please refer to our Multicolor Flow Cytometry web page at www.bdbiosciences.com/colors.
6. An isotype control should be used at the same concentration as the antibody of interest.
7. Since applications vary, each investigator should titrate the reagent to obtain optimal results.
8. 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.
9. Researchers should determine the optimal concentration of this reagent for their individual applications.
10. 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.
