CD154 (CD40 Ligand, CD40-L, CD40L, CD40LG, gp39, hCD40L, HIGM1, IGM, IMD3, T-BAM, T-cell Antigen GP39, TNF-related Activation Protein, TRAP, Tumor Necrosis Factor Ligand Superfamily Member 5, TNF Ligand Superfamily Member 5, TNFSF5) (AP)

Recognizes the human CD154 cell surface antigen, a 32kD glycoprotein also known as CD40 ligand. CD154 is expressed on activated T lymphocytes, predominantly CD4+ve cells and also on some basophils and mast cells. Clone 3H1894 has been reported to block binding of CD40 ligand to its receptor CD40.