Anti-interleukin 1 family member 10 (theta) antibodies are protein reagents that detect specific antigens. The interleukin 1 family member 10 (theta) antigen is another term for the human protein interleukin 1 family member 10, encoded by the IL1F10 gene. The protein is known to function in the cellular response to lipopolysaccharides and cytokine-mediated signaling pathways, among other biological roles. Canonically, it has an amino acid length of 152 residues and a mass of 16.9 kilodaltons. Its subcellular localization is in the cytoplasm and is secreted. It is reported to be expressed in fetal skin, spleen and tonsil. The interleukin 1 family member 10 (theta) protein is a member of the IL-1 protein family. Other alias names for interleukin 1 family member 10 (theta) include FIL1 theta, IL-1 theta, and IL-1F10 (canonical form IL-1F10a).