Anti-MRGX4 antibodies enable researchers to detect and measure the MRGX4 antigen in biological samples. This target is a reported synonym of the MRGPRX4 gene, which encodes MAS related GPR family member X4. This protein is known to function in GPCR signaling pathways, among other biological roles. The human version of MRGX4 has a canonical amino acid length of 322 residues and a protein mass of 36.5 kilodaltons. It is reported to be localized in the cell membrane of cells. MRGX4 is a member of the G-protein coupled receptor 1 protein family.