Product Description: The product contains the polyhedrin protein co-crystalized with Human BMP-4. Bone Morphogenic Protein 4 (BMP-4) is a member of the Bone Morphogenetic Protein (BMP) family. These proteins are synthesized as large precursor molecules which are cleaved by proteolytic enzymes. BMP proteinsstimulate the production of bone matrix proteins and osteoclasts proliferation, and can be found on tissues related with bone or cartilage growth.