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IgM, Mab anti_Bovine; Clone IL_A30, ELISA,flow,IP,R

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[#YSRTMCA2443] IgM, Mab anti_Bovine; Clone IL_A30, ELISA,flow,IP,R


YSRTMCA2443 | IgM, Mab anti_Bovine; Clone IL_A30, ELISA,flow,IP,R, 0.25 mg.
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(1) Arthrogenicity of type II collagen monoclonal antibodies associated with complement activation and antigen affinity.[TOP]

Pubmed ID :22054174
Publication Date : //
The collagen antibody-induced arthritis (CAIA) model, which employs a cocktail of monoclonal antibodies (mAbs) to type II collagen (CII), has been widely used for studying the pathogenesis of autoimmune arthritis. In this model, not all mAbs to CII are capable of inducing arthritis because one of the initial events is the formation of collagen-antibody immune complexes on the cartilage surface or in the synovium, and subsequent activation of the complement by the complexes induces arthritis, suggesting that a combination of mAbs showing strong ability to bind mouse CII and activate the complement may effectively induce arthritis in mice. In the present study, we examined the relationship between the induction of arthritis by the combination of IgG2a (CII-6 and C2A-12), IgG2b (CII-3, C2B-14 and C2B-16) and IgM (CM-5) subclones of monoclonal antibodies (mAb) of anti-bovine or chicken CII and the ability of mAbs to activate complement and bind mouse CII.

Authors : Koobkokkruad Thongchai, Kadotani Tatsuya, Hutamekalin Pilaiwanwadee, Mizutani Nobuaki, Yoshino Shin,

(2) In vivo binding of immunoglobulin M to the surfaces of Babesia bigemina-infected erythrocytes.[TOP]

Pubmed ID :9596768
Publication Date : //
Babesia bigemina infection of mature bovine erythrocytes results in new proteins specifically exposed on the parasitized cell surface. Monoclonal antibody (MAb) 64/32 binds a protein, designated p94, on B. bigemina-infected erythrocytes but not on either uninfected or B. bovis-parasitized erythrocytes. However, p94 was not encoded by B. bigemina and was not a parasite-modified erythrocyte membrane protein. In contrast, we showed that p94 could be eluted from the infected erythrocyte surface and was identified as specifically bound immunoglobulin M (IgM) heavy chain for the following reasons: (i) MAb 64/32 bound a reduced molecule of 94 kDa in both infected erythrocyte lysates and normal bovine serum; (ii) MAb 64/32 bound a 94-kDa molecule in reduced preparations of purified IgM; (iii) an anti-bovine mu heavy-chain MAb, BIg73, reacted specifically with the surface of infected erythrocytes and bound the 94-kDa molecule in lysates of infected erythrocytes, normal bovine serum, and purified IgM; and (iv) immunoprecipitation of infected erythrocyte lysates with MAb 64/32 depleted the 94-kDa antigen bound by anti-mu MAb BIg73 and vice versa. Binding of IgM to the infected erythrocyte surface was detected in vivo early in acute parasitemia and occurred during both the trophozoite and merozoite stages of intraerythrocytic parasitism. The common feature of IgM binding to the parasitized erythrocyte surface among otherwise genetically and antigenically distinct B. bigemina strains is suggestive of an advantageous role in parasite survival in vivo.

Authors : Echaide I E, Hines S A, McElwain T F, Suarez C E, McGuire T C, Palmer G H,

(3) Functional conformations of calmodulin: I. Preparation and characterization of a conformational specific anti-bovine calmodulin monoclonal antibody.[TOP]

Pubmed ID :7541230
Publication Date : //
Calmodulin, similarly to many other Ca(2+)-activated proteins, undergoes considerable conformational changes in the presence of Ca2+ ions. These changes were followed using specific monoclonal antibodies against calmodulin. Since calmodulin is a poor immunogen due to its high phylogenetic conservancy, glutaraldehyde-crosslinked bovine brain extract, which contains a considerable amount of functionally active calmodulin complexed with its target proteins, was used as an antigen. Out of nine anti-calmodulin mAbs isolated, three (namely, CAM1, CAM2 and CAM4) were purified and characterized. MAb CAM1 was identified as an IgG1 while mAbs CAM2 and CAM4 belong to IgM class. Additivity ELISA showed that mAb CAM1 binds to an epitope located remote from the epitopes recognized by the other two mAbs, while mAbs CAM2 and CAM4 recognize close epitopes. MAb CAM1 was found to be especially sensitive to the conformational state of calmodulin in the presence of Ca2+ ions. The interactions of mAbs CAM2 and CAM4 with calmodulin are only slightly affected by Ca2+ removal. In addition mAb CAM1 failed to recognize other calmodulin molecules, such as spinach and various plant recombinant calmodulins, while mAbs CAM1 and CAM4 share common epitopes with the above molecules.

Authors : Wolf T, Fleminger G, Solomon B,

(4) The application of hybridoma technology to the study of bovine immunoglobulins.[TOP]

Pubmed ID :3501632
Publication Date : //
Studies are described in which hybridoma technology is used to produce a variety of reagents for the characterization and manipulation of the bovine humoral immune system. Selected members of a set of murine monoclonal antibodies (MAb) specific for each of four major isotypes of bovine Ig constant regions, one specific for anti-bovine Ig constant regions as well as one specific for anti-bovine light chains are discussed. Interspecific fusion of bovine lymphocytes with the established mouse cell line, SP2/0 was used to produce a collection of stable hybridomas among which were found secretors of bovine IgG1, IgG2, IgM, IgA and bovine light chain. Interspecific fusion of SP2/0 with lymphocytes from a multiparous Holstein four days post immunization with Streptococcus agalactiae yielded MAb with specificity for the immunizing antigen. One of these hybridomas, LHRB 19.17, which displayed a particularly stable secretory phenotype, was used as an immunogen for the production of a library of murine monoclonal anti-idiotype antibodies. Competitive antigen binding analysis showed that 15 of the 24 anti-LHRB 19.17 idiotype antibodies isolated blocked the binding of the idiotype to its nominal antigen and so were candidates for evaluation as antigen mimics. Some of the ways in which monoclonal anti-idiotypes in particular, and monoclonal in general, might be of use in problems of animal disease are discussed.

Authors : Goldsby R A, Srikumaran S, Arulanandam A, Hague B, Ponce de Leon F A, Sevoian M, Guidry A J,

(5) Production and characterization of a bovine T cell-specific monoclonal antibody identifying a mature differentiation antigen.[TOP]

Pubmed ID :3079788
Publication Date : //
A monoclonal antibody (MAb), BLT-1, with specificity for bovine mature T cells was prepared by somatic cell hybridization of myeloma NS-1 and spleen cells from BALB/c mice hyperimmunized with bovine T lymphocytes. The MAb reacted with over 92% of nylon wool-nonadherent lymphocytes (T cells) but not with nylon wool-adherent EAC-positive lymphocytes (B cells) in the indirect immunofluorescence assay. It is an IgM, with kappa-light chains, which fixed complement well and killed over 95% of mature T cells in complement-mediated cytotoxicity assays. It reacted with the same proportions of peripheral lymphoid cells (peripheral blood, lymph nodes, and spleen) as the polyclonal goat anti-bovine thymocyte serum (GABTS), but only with 25% of GABTS-positive thymocytes. Immunoperoxidase staining of frozen tissue sections showed that the BLT-1-positive cells were located in the medulla of the thymus and in the T lymphocyte areas of lymph nodes. Western immunoblotting assays showed that the BLT-1-reactive membrane antigen is a 22,000 m.w. protein which was inducible in bovine thymocytes with bovine thymic hormones, thymosin fraction 5, thymosin alpha 1, and thymopentin ORF-18150, indicating that it is a mature T lymphocyte differentiation antigen. The thymosin alpha 1 and thymopentin were found to show additive effects on mature T cell antigen expression by bovine thymocytes.

Authors : Rabinovsky E D, Yang T J,