The CER1 protein, a DAN family BMP antagonist, coordinates growth-promoting ureteric bud signaling by inducing BMP inhibition. CER1 also regulates embryogenesis and carcinogenesis by inhibiting NODAL signaling to SMAD2 or SMAD3 through ALK4/ALK7. Cerberus 1/CER1 Protein, Human (HEK293, His) is the recombinant human-derived Cerberus 1/CER1 protein, expressed by HEK293 , with C-6*His labeled tag.