Used in immunological research to detect and analyze the TLR4/MD2 complex on mouse immune cells, particularly macrophages and dendritic cells. This antibody conjugate enables flow cytometry analysis to study innate immune responses, especially in experiments involving lipopolysaccharide (LPS) signaling. It helps researchers investigate inflammatory pathways, immune activation, and the role of TLR4 in infection, autoimmunity, and vaccine development. The PE label allows for direct fluorescence detection, facilitating multi-color cell surface marker analysis in combination with other antibodies.