BMPR1A/ALK-3 protein (ACVRLK3) is the receptor bone morphogenetic protein (BMP) type I receptors, widely expressed in tissues[1]. BMPR1A/ALK-3 protein mediates iron metabolism factor hepcidin expression, interacts with GDF5/6 to regulate chondrocyte differentiation and adipogenesis[2][3]. BMPR1A-ID2/ZEB1-TGFBR2 signaling axis could serve as a potentia target for pulmonary arterial hypertension (PAH) and other endothelial-mesenchymal transition (EndoMT)-related vascular disorders[4]. BMPR1A/ALK-3 Protein, Canine (HEK293, Fc) is a recombinant protein produced in the HEK293 cells with C-terminal hFc-tag.