Anti-CER1 antibodies are used in the immunodetection of the protein cerberus 1, DAN family BMP antagonist. In humans, the canonical protein has a reported length of 267 amino acid residues and a mass of 30.1 kDa. It is known to be a secreted protein. A member of a the DAN protein family, CER1 is a reported cytokine that may play a role in anterior neural induction and somite formation during embryogenesis in part through a BMP-inhibitory mechanism. Post-translational modifications have been described, including N-glycosylation. Synonyms for this target antigen include cerberus, DAN domain family member 4, cerberus 1, cysteine knot superfamily, homolog, cerberus-related 1, cerberus-related protein, and DAND4.