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R718 Mouse Anti-Human CD222
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BD OptiBuild™
Human (Tested in Development)
Mouse IgG1
Human Recombinant Vaccinia virus encoding CD222
Flow cytometry (Qualified)
0.2 mg/ml
VII 70640
Aqueous buffered solution containing ≤0.09% sodium azide.

Preparation and Storage

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.


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 CompBead to ensure that BD CompBeads are appropriate for your specific cellular application.

Product Notices

  1. Researchers should determine the optimal concentration of this reagent for their individual applications.
  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. An isotype control should be used at the same concentration as the antibody of interest.
  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. Alexa Fluor® is a registered trademark of Life Technologies Corporation.
  6. Please refer to to access safety data sheets (SDS).
  7. Please refer to for technical protocols.
  8. This product is provided under an Agreement between BIOTIUM and BD Biosciences. This product, and only in the amount purchased by buyer, may be used solely for buyer’s own internal research, in a manner consistent with the accompanying product literature. No other right to use, sell or otherwise transfer (a) this product, or (b) its components is hereby granted expressly, by implication or by estoppel. This product is for research use only. Diagnostic uses require a separate license from Biotium, Inc. For information on purchasing a license to this product including for purposes other than research, contact Biotium, Inc., 3159 Corporate Place, Hayward, CA 94545, Tel: (510) 265-1027. Fax: (510) 265-1352. Email:
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The MEM-238 monoclonal antibody specifically binds to CD222, which is also known as the Insulin-like growth factor 2 Receptor (IGF2R, IGF-II Receptor), Cation-independent mannose 6-phosphate receptor (CIMPR), or Mannose-6 phosphate receptor (M6PR). CD222 is ubiquitously expressed by a variety of cell types as a cell surface type I transmembrane glycoprotein. However, in the course of receptor trafficking between the cell surface and intracellular compartments, the majority of CD222 is found within cells. Cell surface CD222 functions as a multifunctional receptor that binds to a large number of extracellular ligands including acid hydrolases, insulin-like growth factors, latent TGF-β, leukemia inhibitory factor (LIF), proliferin, prorenin, plasminogen, and Herpes simplex virus. It regulates extracellular Insulin-like growth factor II (IGF-II/IGF-2) levels by binding and internalizing the growth factor for lysosomal degradation.  This effectively removes IGF-II from the circulation and tissues and thus prevents it from signaling through the growth-stimulatory Insulin-like growth factor I Receptor (IGF-1R, CD221) pathway. However, studies have reported that IGF-II may activate some cellular functions through CD222 as well. A soluble form of the CD222 extracellular region can also be detected in human serum and may play a role in regulating IGF-II activity. CD222 serves as a surface receptor for latent TGFβ and can complex with plasminogen and CD87, a urokinase-type plasminogen activator receptor, to activate latent TGF-β. CD222 also binds to a variety of Mannose 6-phosphate (M6P)-containing proteins, including extracellular and newly-synthesized lysosomal enzymes, and transports them to lysosomes.

The antibody was conjugated to BD Horizon Red 718, which has been developed exclusively for BD Biosciences as a better alternative to Alexa Fluor® 700. BD Horizon Red 718 can be excited by the red laser (628 – 640 nm) and, with an Em Max around 718 nm, it can be detected using a 730/45 nm filter. Due to similar excitation and emission properties, we do not recommend using R718 in combination with APC-R700 or Alexa Fluor® 700.

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The BD Horizon™ Red 718 (R718) Dye is part of the BD red family of dyes. It is a small organic fluorochrome with an excitation maximum (Ex Max) at 695-nm and an emission maximum (Em Max) at 718-nm. Driven by BD innovation, R718 is designed to be excited by the red laser (627–640-nm) and detected using an optical filter centered near 720-nm (e.g., a 720/40-nm bandpass filter). R718 is a brighter alternative to Alexa Fluor™ 700. R718 is also a bright small molecule alternative to APC-R700 with lower spread into the APC detector. Please ensure that your instrument’s configurations (lasers and optical filters) are appropriate for this dye.
Red 627-640 nm
695 nm
718 nm
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Development References (4)

  1. Brown J, Jones EY, Forbes BE. Keeping IGF-II under control: lessons from the IGF-II-IGF2R crystal structure. Trends Biochem Sci. 2009; 34(12):612-619. (Biology). View Reference
  2. Godar S, Leska V, Cebecauer M, Hilgert I, Horejsi V, Stockinger H. Cd222 (Mannose-6 phosphate/insulin-like growth factor II-receptor) Summary and Workshop report. In: Mason D. David Mason .. et al., ed. Leucocyte typing VII : white cell differentiation antigens : proceedings of the Seventh International Workshop and Conference held in Harrogate, United Kingdom. Oxford: Oxford University Press; 2002:482-485.
  3. Leksa V, Godar S, Cebecauer M, et al. The N terminus of mannose 6-phosphate/insulin-like growth factor 2 receptor in regulation of fibrinolysis and cell migration. J Biol Chem. 2002; 277(43):40575-40582. (Immunogen: Flow cytometry, Western blot). View Reference
  4. Leksa V, Godar S, Schiller HB, et al. TGF-beta-induced apoptosis in endothelial cells mediated by M6P/IGFII-R and mini-plasminogen. J Cell Sci. 2005; 118(Pt19):4577-4586. (Clone-specific: Flow cytometry, Fluorescence microscopy, Immunoaffinity chromatography, Immunofluorescence, Immunoprecipitation, Western blot). View Reference
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Global - Refer to manufacturer's instructions for use and related User Manuals and Technical data sheets before using this products as described

Comparisons, where applicable, are made against older BD Technology, manual methods or are general performance claims.  Comparisons are not made against non-BD technologies, unless otherwise noted.

For Research Use Only. Not for use in diagnostic or therapeutic procedures.