Anti-Pentraxin 3 antibody, Mouse monoclonal (mouse IgG1 isotype) is derived from the PTX3-5 hybridoma, produced by the fusion of mouse myeloma cells and splenocytes from BALB/c mouse immunized with recombinant human pentraxin 3 protein expressed in HEK-293 cells. Pentraxin 3 (PTX3), also called tumor necrosis factor inducible gene 14 protein (TSG-14), is a highly glycosylated secreted protein usually found as covalently-bound homooctamers. PTX3 belongs to the pentraxin subfamily, sharing the C-terminal domain with short pentraxins and contains a unique N-terminal domain. PTX3 is majorly present in monocytes, macrophages, fibroblasts, endothelial cells and adipocytes. It is an acute-phase protein mapped to human chromosome 3q25.32.