Specificity
This antibody recognises the soluble form of human CD154, also designated CD40L (sCD40 Ligand), a member of the TNF receptor superfamily, comprising the full-length of the TNF homologous region of CD154.CD154 is expressed predominantly on activated CD4+ T lymphocytes, and acts as a costimulatory molecule in B cell differentiation/proliferation, immunoglobulin switching and germinal centre formation, through interaction with the CD40 receptor on B cells, and cytokines secreted by activated T cells.