C.I. Mordant Brown 1

C.I. Mordant Brown 1 is an azo dye with absorption maxima at 373 nm and 487 nm. It functions as an inhibitor of the CD40-CD154 protein-protein interaction, a key co-stimulatory pathway in immunology. This small molecule is used in biochemical and immunological research, including in vitro studies of T-cell activation and immune signaling.