BAMBI is a membrane spanning glycoprotein that acts as a negative regulator of TGF-β signaling during development. The BAMBI family of proteins are related to type I TGF-β receptor family, however, BAMBI is a pseudoreceptor that lacks an intracellular serine/threonine kinase domain. BAMBI transcription regulation is under the influence of β-catenin, BMP, smad3 and smad4. BAMBI expression can increase in colorectal and hepatocellular carcinomas relative to non-cancerous tissues. BAMBI is ex