^ http://purl.obolibrary.org/obo/PR_000000373

An inhibitory smad protein that is a translation product of the human SMAD6 gene or a 1:1 ortholog thereof. Inhibitor of bone morphogenetic protein (BMP) signaling, and the interaction with BMP type 1 receptors is a critical step in the function of smad6. [ http://www.ncbi.nlm.nih.gov/pubmed/17493940 ]

Synonyms: Mad homolog 7, MAD homolog 6, SMAD family member 6, SMAD6, SMAD 6, mothers against DPP homolog 6