recent advances in the isolation and characterization of a large number of different extracellular matrix macromolecules ( eg various types of collagens , fibronectin , chondronectin , osteonectin , laminin , proteoglycans , enamel protein ) now suggest a renewed interest in this problem area , and also the promise for significant breakthroughs in the near future .
C0015350
extracellular matrix
C0029446
osteonectin