Bgn, also known as biglycan preproprotein, is a small leucine-rich repeat proteoglycan (SLRP). It binds to the growth factors BMP-4 and influences BMP-4 bioactivity. It plays an important role in stabilizing fibrotic scars after experimental myocardial infarction. It may function in connective tissue metabolism by binding to collagen fibrils and TGF-beta and may promote neuronal survival. Its ablation improves cardiac function and attenuates left ventricular hypertrophy and fibrosis after long-term pressure overload. It is found in a variety of extracellular matrix tissues, including bone, cartilage and tendon. Recombinant mouse Bgn, fused to hIgG-His-Tag at C-terminal, expressed in insect cell and purified by using conventional chromatography techniques.