Enables protein homodimerization activity. Involved in negative regulation of mesoderm development; negative regulation of transmembrane receptor protein serine/threonine kinase signaling pathway; and ureteric bud development. Acts upstream of or within several processes, including cellular response to cadmium ion; growth plate cartilage chondrocyte proliferation; and signal transduction involved in regulation of gene expression. Located in extracellular space. Is expressed in several structures, including alimentary system; brain; genitourinary system; paraxial mesenchyme; and sensory organ. Orthologous to human CER1 (cerberus 1, DAN family BMP antagonist). [provided by Alliance of Genome Resources, Apr 2022]