MeSH definition : A receptor-regulated smad protein that undergoes PHOSPHORYLATION by ACTIVIN RECEPTORS,
TYPE I. It regulates TRANSFORMING GROWTH FACTOR BETA and ACTIVIN signaling.;
A receptor-regulated smad protein that undergoes PHOSPHORYLATION by ACTIVIN RECEPTORS,
TYPE I. It regulates TRANSFORMING GROWTH FACTOR BETA and ACTIVIN signaling.