Siglec-9 Protein is a member of the Siglec cell surface immunoglobulin family. Siglec-9 is highly expressed on human neutrophils and monocytes and low on natural killer cells, and sub-populations of T and B lymphocytes. Siglec-9 induces human neutrophil apoptosis and autophagy-like cell death and also inhibits tumor activity[1][2][3]. Siglec-9 Protein, Cynomolgus (HEK293, His) is the recombinant cynomolgus-derived Siglec-9 protein, expressed by HEK293 , with C-His labeled tag. The total length of Siglec-9 Protein, Cynomolgus (HEK293, His) is 331 a.a., with molecular weight of 55-70 kDa.