Anti-DC-SIGN/CD209 Antibody is a specific monoclonal antibody targeting DC-SIGN (CD209). As a C-type lectin primarily expressed on the surface of dendritic cells, DC-SIGN is involved in pathogen recognition and the regulation of immune responses. This antibody is widely applied to study mechanisms of viral trans-infection (e.g., HIV-1), antigen presentation processes, and the development of dendritic cell-targeted vaccines.