Binds to TGF-beta. Could be involved in capturing and retaining TGF-beta for presentation to the signaling receptors (By similarity). In gonadotrope cells, acts as an inhibin A coreceptor and regulates follicle-stimulating hormone (FSH) levels and female fertility .
Subcellular locations: Cell membrane, Secreted, Secreted, Extracellular space, Extracellular matrix
Exists both as a membrane-bound form and as soluble form in serum and in the extracellular matrix.