Pro Bone Morphogenetic Protein -2 Human Recombinant is the precursor of BMP-2 which has 3 intramolecular cystein bridges is a homodimer, non-glycosylated, polypeptide chain containing 377 amino acids and having a molecular mass of 85,476 Dalton. Pro Bone Morphogenetic Protein 2 is purified by proprietary chromatographic techniques.