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Expression of Fas antigen on mouse thymocytes analyzed by flow cytometry. Thymocytes from a BALB/c mouse were incubated with either Jo2 followed by a Streptavidin-PE conjugated second-step (Cat. No. 554061, filled histogram) or with only second step (open histogram). Jo2 specifically stained more than 90% of the cells.
Expression of Fas antigen on mouse thymocytes analyzed by flow cytometry. Thymocytes from a BALB/c mouse were incubated with either Jo2 followed by a Streptavidin-PE conjugated second-step (Cat. No. 554061, filled histogram) or with only second step (open histogram). Jo2 specifically stained more than 90% of the cells.
Expression of Fas antigen on mouse thymocytes analyzed by flow cytometry. Thymocytes from a BALB/c mouse were incubated with either Jo2 followed by a Streptavidin-PE conjugated second-step (Cat. No. 554061, filled histogram) or with only second step (open histogram). Jo2 specifically stained more than 90% of the cells.
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Fas antigen, CD95, is a 45 kDa cell-surface protein which can mediate apoptosis. It belongs to the TNF (tumor necrosis factor)/NGF receptor family. Expression of Fas has been described in the thymus, liver, heart, lung and ovary. Fas plays an important role in the apoptotic process that takes place during development. Monoclonal antibodies recognizing Fas such as Jo2 have cytolytic activity on cells expressing Fas. The cell death stimulated by Fas antibodies is characteristic of apoptosis and suggests that the lethal effects are a result of interaction of antibody with a functional Fas antigen as opposed to complement-mediated lysis.
The Jo2 antibody recognizes mouse Fas. The Jo2 antibody shows cytolytic activity against cell lines expressing mouse Fas by inducing apoptosis. Intraperitoneal injections of Jo2 mAb have been shown to kill mice and induce apoptotic hepatocyte death. Jo2 mAb has been reported to immunoprecipitate mouse Fas as a 45 kDa band from W4 cells. W4 cells are WR19L mouse lymphoma cells transformed with mouse Fas. The difference between the observed MW of Fas and that deduced from its amino acid sequence (Mr 34,971) may be due to glycosylation.
This antibody is routinely tested by flow cytometric analysis. Other applications were tested at BD Biosciences Pharmingen during antibody development only or reported in the literature.
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For Research Use Only. Not for use in diagnostic or therapeutic procedures.