Anti-Za11 antibodies enable researchers to detect and measure the Za11 antigen in biological samples. This target is a reported synonym of the IL21 gene, which encodes interleukin 21. This protein is known to function in viral immune response and germinal center B cell differentiation, among other biological roles. The human version of Za11 has a canonical amino acid length of 162 residues and a protein mass of 18.7 kilodaltons, although 2 isoforms have been identified. It is reported to be a secreted protein. Za11 is a member of the IL-15/IL-21 protein family. Western Blot is a widely used application for the Za11 antibodies listed below. In addition, ELISA is also a common application.