sentences:  Syndecan
  
  Syndecans are single transmembrane domain proteins that are thought to act as coreceptors, especially for G protein-coupled receptors.These core proteins carry three to five heparan sulfate and chondroitin sulfate chains, which allow for interaction with a large variety of ligands including fibroblast growth factors, vascular endothelial growth factor, transforming growth factor-beta, fibronectin and antithrombin-1.