Identification of fibronectin fragments that bind to carboxy-group-modified proteins.

Limited proteolysis of human plasma fibronectin with chymotrypsin, trypsin or thermolysin has been used to localize binding sites responsible for binding [Vuento, Korkolainen & Stenman (1982) Biochem. J. 205, 303-311] of fibronectin to carboxy-group-modified proteins. These bindings sites are different from those mediating binding of fibronectin to gelatin or heparin. They are located close to the C-terminus of the polypeptide chains of fibronectin, and apparently overlap with the C-terminal fibrin binding site.