FibronectinsCarbohydratesGlycopeptidesFibroblastsExtracellular MatrixPeptide FragmentsElectrophoresis, Polyacrylamide GelTrypsinAmino AcidsCell LineMolecular WeightExtracellular Matrix ProteinsMatrix Metalloproteinase 2Matrix MetalloproteinasesNuclear MatrixBone MatrixMatrix Metalloproteinase 1Matrix Metalloproteinase InhibitorsMatrix Metalloproteinase 3