Biglycan （BGN） is a small cellular or pericellular matrix proteoglycan which takes part in assembly of collagen fibrils and muscle regeneration. BGN is closely correlated in structure to two other small proteoglycans， decorin and fibromodulin. BGN interacts with several proteins involved in muscular dystrophy， including alpha-dystroglycan， alpha- and gamma-sarcoglycan and collagen VI. BGN is also critical for the assembly of the dystrophin-associated protein complex.
