sentences:  Interactions between fibronectin and some syndecans can be modulated by the extracellular matrix protein tenascin C.
  
  The syndecan protein family has four members.Syndecans 1 and 3 and syndecans 2 and 4, making up separate subfamilies, arose by gene duplication and divergent evolution from a single ancestral gene.The syndecan numbers reflect the order in which the cDNAs for each family member were cloned.