Molecular Probes Fibronectin ECM (IMAGE) Georgia Institute of Technology Caption Molecular probes displaying the LNLPHG and RFSAFY peptide sequences showed the greatest binding affinity to fibronectin fibers and the greatest efficiency in discriminating between relaxed and strained fibers. On extracellular matrix assembled by primary lung fibroblasts, LNLPHG preferentially attached to relaxed fibronectin fibers (top row), whereas RFSAFY bound to strained fibers (bottom row). (The scale bar is 20 microns) Credit Georgia Tech/Thomas Barker Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.