GAP214 is a monosaccharide lipid A analogue and TLR4/MD-2 complex modulator.GAP214 binds to the TLR4/MD-2 complex via hydrophobic interactions, salt bridges, and hydrogen bonds, induces dimerization of the complex to initiate intracellular signaling cascades.GAP214 functions as an immunostimulant and vaccine adjuvant, enhances antigen-specific IgG antibody production in a mouse model[1].