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Activating Factor, B-Cell

A Tumor Necrosis Factor superfamily member that plays a Role in the Regulation of B-Lymphocyte Survival. It occurs as a Membrane-bound protein that is cleaved to release an biologically active soluble form with specificity to Transmembrane Activator and CAML Interactor Protein; B-Cell Activation Factor Receptor; and B-Cell Maturation Antigen.