Skip to main content Skip to navigation
FITC Mouse Anti-Mouse CD72 a, b, and d Alloantigens
Product Details
Down Arrow Up Arrow

BD Pharmingen™
Lyb-2.1; Lyb-2.2; and Lyb-2.4
Mouse (QC Testing)
Mouse SJL IgG2b, κ
(C57BL/6 • DBA/2)F1 hybrid mouse pre-B-cell leukemia line 70Z/3
Flow cytometry (Routinely Tested)
0.5 mg/ml
Aqueous buffered solution containing ≤0.09% sodium azide.

Preparation And Storage

The monoclonal antibody was purified from tissue culture supernatant or ascites by affinity chromatography. The antibody was conjugated with FITC under optimum conditions, and unreacted FITC was removed. Store undiluted at 4°C.

Product Notices

  1. Since applications vary, each investigator should titrate the reagent to obtain optimal results.
  2. Please refer to for technical protocols.
  3. 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.
550966 Rev. 6
Antibody Details
Down Arrow Up Arrow

The K10.6 monoclonal antibody specifically recognizes Lyb-2.1, Lyb-2.2, and Lyb-2.4 (CD72 a, b, and d alloantigens, respectively). CD72 is a 45-kDa type-II membrane protein, containing a C-type lectin-like domain and ITIM and ITIM-like sequences in the cytoplasmic tail. CD72 is expressed at all stages of B-lymphocyte development except plasma cells, and it has been shown to negatively regulate B-cell receptor signaling. Analysis of CD72-deficient mice supports these results and shows that CD72 is involved in B-cell development. CD72-stimulated B cells show a transient association of CD19 with CD72, as well as an increase in Tyr-phosphorylation of CD19. CD72 is reported to be a ligand for CD5, although this is controversial. It is also reported to be a ligand for CD100 (Sema4D). The CD72 alloantigens Lyb-2.1 (originally identified as Ly-m19.2), Lyb-2.2 (originally identified as Ly-32.2), Lyb-2.3, and Lyb-2.4 are encoded by the Cd72[a], Cd72[b], Cd72[c], and Cd72[d] alleles, respectively. Lyb-2.1 is expressed on B lymphocytes of CBA/J, C3H/Bi, C57BR, C57L, C58, DBA/1, DBA/2, and SWR strains. Lyb-2.2 is expressed on B lymphocytes, a subset of peripheral T cells, and activated T lymphocytes in A, BALB/c, CBA/H, C3H/He, C57BL, PL, and 129 strains. Lyb-2.4 is expressed on a subset of splenocytes of the STS/A strain. K10.6 antibody does not react with Lyb-2.3 (AKR and SJL strains) nor with non-lymphoid tissues. Five serological specificities of CD72 alloantigens have been described and the nomenclature CD72.1, CD72.2, CD72.3, CD72.4, and CD72.5 proposed, which does not correspond to the names of the alleles. Some authors have referred to the specificity of mAb K10.6 as CD72.4.

550966 Rev. 6
Format Details
Down Arrow Up Arrow
Fluorescein (FITC) is part of the BD blue family of dyes. This is a small organic fluorochrome with an excitation maximum (Ex Max) at 494-nm and an emission maximum (Em Max) at 518-nm. FITC is designed to be excited by the Blue laser (488-nm) and detected using an optical filter centered near 520 nm (e.g., a 530/30-nm bandpass filter). Please ensure that your instrument’s configurations (lasers and optical filters) are appropriate for this dye.
Blue 488 nm
494 nm
518 nm
550966 Rev.6
Citations & References
Down Arrow Up Arrow

Development References (12)

  1. Adachi T, Wakabayashi C, Nakayama T, Yakura H, Tsubata T. CD72 negatively regulates signaling through the antigen receptor of B cells.. J Immunol. 2000; 164(3):1223-9. (Biology). View Reference
  2. Bikah G, Lynd FM, Aruffo AA, Ledbetter JA, Bondada S. A role for CD5 in cognate interactions between T cells and B cells, and identification of a novel ligand for CD5. Int Immunol. 1998; 10(8):1185-1196. (Biology). View Reference
  3. Doolittle, D.P., M.T. Davisson, J.N. Guidi, and M.C. Green. M.F. Lyon, S. Rastan and S.D.M. Brown, ed. Genetic variants and strains of the laboratory mouse. Oxford : Oxford University Press; 1996:133.
  4. Kumanogoh A, Watanabe C, Lee I, et al. Identification of CD72 as a lymphocyte receptor for the class IV semaphorin CD100: a novel mechanism for regulating B cell signaling. Immunity. 2000; 13(5):621-631. (Biology). View Reference
  5. Luo W, Van de Velde H, von Hoegen I, Parnes JR, Thielemans K. Ly-1 (CD5), a membrane glycoprotein of mouse T lymphocytes and a subset of B cells, is a natural ligand of the B cell surface protein Lyb-2 (CD72). J Immunol. 1992; 148(6):1630-1634. (Biology). View Reference
  6. Pan C, Baumgarth N, Parnes JR. CD72-deficient mice reveal nonredundant roles of CD72 in B cell development and activation. Immunity. 1999 October; 11(4):495-506. (Biology). View Reference
  7. Robinson WH, Landolfi MM, Parnes JR. Allele-specific expression of the mouse B-cell surface protein CD72 on T cells. Immunogenetics. 1997; 75(3):195-200. (Biology). View Reference
  8. Robinson WH, Landolfi MM, Schäfer H, Parnes JR. Biochemical identity of the mouse Ly-19.2 and Ly-32.2 alloantigens with the B cell differentiation antigen Lyb-2/CD72. J Immunol. 1993 November; 151(9):4764-4772. (Biology). View Reference
  9. Robinson WH, Ying H, Miceli MC, Parnes JR. Extensive polymorphism in the extracellular domain of the mouse B cell differentiation antigen Lyb-2/CD72.. J Immunol. 1992; 149(3):880-6. (Biology). View Reference
  10. Tada N, Kimura S, Liu Y, Taylor BA, Hämmerling U. Ly-m19: the Lyb-2 region of mouse chromosome 4 controls a new surface alloantigen. Immunogenetics. 1981; 13(6):539-546. (Immunogen). View Reference
  11. Venkataraman C, Lu PJ, Buhl AM, Chen CS, Cambier JC, Bondada S. CD72-mediated B cell activation involves recruitment of CD19 and activation of phosphatidylinositol 3-kinase. Eur J Immunol. 1998 October; 28(10):3003-3016. (Biology). View Reference
  12. Ying H, Healy JI, Goodnow CC, Parnes JR. Regulation of mouse CD72 gene expression during B lymphocyte development. J Immunol. 1998; 161(9):4760-4767. (Biology). View Reference
View All (12) View Less
550966 Rev. 6

Please refer to Support Documents for Quality Certificates

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.