Anti-CA1 antibodies are used in the immunodetection of the protein carbonic anhydrase 1. In humans, the canonical protein has a reported length of 261 amino acid residues and a mass of 28.9 kDa. Its subcellular localization is in the cytoplasm. It is notably expressed in the spleen, rectum, colon, and bone marrow. A member of the Alpha-carbonic anhydrase protein family, CA1 is known to catalyze the reversible hydration of carbon dioxide. Synonyms for this target antigen include CAB, HEL-S-11, carbonate dehydratase I, carbonic anhydrase B, and CA-I. CA1 gene orthologs have been reported in the mouse, rat and chimpanzee species. A number of CA1 antibodies have been mentioned in research publications and have associated citations. Western Blot is a widely used application for these antibodies. ELISA and Immunohistochemistry are also common applications.