Use of spin label EPR spectra to monitor peptide chain aggregation inside resin beads.

An EPR approach to monitor peptide chain aggregation inside resin beads is introduced. Model low and highly peptide-loaded resins containing an aggregating sequence were labeled with a paramagnetic amino acid derivative and studied with regard to their solvation behavior in different solvent systems. for the first time in the peptide synthesis, EPR spectroscopic has allowed the detection of differentiated levels of peptide chain aggregation as a function of solvent and resin loading. (C) 1997, Elsevier B.V. All rights reserved.UNESP,INST CHEM,DEPT BIOCHEM,BR-14800060 ARARAQUARA,SP,BRAZILUNIV São Paulo,INST CHEM,DEPT BIOCHEM,BR-05599970 São Paulo,BRAZILWeb of Scienc