Anti-AC3-33 antibodies enable researchers to detect and measure the AC3-33 antigen in biological samples. This target is a reported synonym of the C3orf33 gene, which encodes chromosome 3 open reading frame 33. The human version of AC3-33 has a canonical amino acid length of 294 residues and a protein mass of 33.8 kilodaltons, although 2 isoforms have been identified. It is reported to be a secreted protein.