Fluorescent Microscopy or Flow Cytometry: 2 μg/5x10e5 cells/test. Activation assays: Working concentration: 10 ng/mL. Study of of B-cell proliferation, B-cell growth and activation factors. Functional Study of B-cell subpopulations. Other applications not tested. Optimal dilutions are dependent on conditions and should be determined by the user.
限制
仅限研究用
溶解方式
Restore with 1 mL of distilled water.
浓度
0.2 mg/mL (prior to lyophilization)
缓冲液
PBS buffer containing 1 mg/mL BSA as stabilizer without preservatives.
CD40 is a 49 kDa type I integral membrane protein of the NGF receptor family. CD40 is found on normal and neoplastic B cells.(1) It is a pan-B marker, absent only from terminally differentiated plasma cells. CD40 is predicted to function in the process of B cell selection in the germinal center. Studies demonstrated that it induces strong homotypic adhesions in resting B cells and, together with Interleukin-4 (IL-4) maintains the cell cycle of B blasts and promotes the switch to IgE secretion. (1,2) Purified B cells cultured in the CD40 system in the presence of IL-10 differentiate into plasma cells and secrete large amounts of immunoglobulins. (3) The ligand for CD40 is a membrane glycoprotein on activated T cells that induces B cell proliferation and immunoglobulin secretion. (4) This clone acts in synergy with IL-4 to induce the increase of B-cell volume and the proliferation of anti IgM antibody-co-stimulated or pre-activated B cells. (5)Synonyms: B-cell surface antigen CD40, Bp50, CD40L receptor, CDw40, TNFRSF5, Tumor necrosis factor receptor superfamily member 5