Anti-CIG antibodies are protein reagents that detect specific antigens. The CIG antigen is another term for the human protein fibronectin 1, encoded by the FN1 gene. The protein is known to function in angiogenesis and cell adhesion, among other biological roles. Canonically, it has an amino acid length of 2477 residues and a mass of 272.3 kilodaltons. Its subcellular localization is in the extracellular matrix and is secreted. It is reported to be expressed in the inner limiting membrane and around blood vessels in the retina. Other alias names for CIG include ED-B and FINC. Some CIG antibodies may have been used in research and have associated citations. Western Blot is a widely used application for these antibodies. ELISA and Immunohistochemistry are also common applications.