importance of the solvation degree of peptide-resin beads for amine groups determination by the picric acid method
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2000
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Abstract
The classic and important picric acid method used in polymers biochemical and chemical fields of polymers for amine group quantification was chosen in this work as a model for evaluating the influence of the resin bead solvation during an analytical procedure. It was observed that this method, proposed almost three decades ago, failed to quantify amine groups of peptidyl-resin containing aggregating and polar sequence. This was due to inefficient solvation of resin beads when only CH2Cl2 was used for picrate anion binding and subsequent washing steps. It was demonstrated that the use of CH2Cl2/DMF (dimethylformamide) and CH2Cl2/EtOH solutions during these steps allows correct determination of peptidyl-resin amine groups. Besides the importance for the solid phase peptide synthesis methodology itself, these findings also represent the first quantitative demonstration of the relationship between solvation degree and the efficiency of a polymer-supported analytical method.
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| Authors | ;Cilli Eduardo M.;Jubilut Guita N.;Ribeiro Suely C. F.;Oliveira Eliandre;Nakaie Clovis R. |
| Journal | british journal of dermatology |
| Year | 2000 |
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