The matrilins represent a new family of oligomeric proteins that are assumed to act as adapter molecules connecting other proteins and proteoglycans in the extracellular matrix. Matrilin-2, the largest member of the family, is a widely distributed, oligomeric extracellular matrix protein. It incorporates into loose and dense connective tissue and forms a filamentous network by binding to a variety of different extracellular matrix proteins.

> 95% as determined by Bis-Tris PAGE