The Role of Peptide Orientation in Ion-Exchange Chromatography: Implications for Enhanced Separation and Analytical Precision

Abstract

This study investigates the role of peptide orientation in ion-exchange chromatography (IEC) and its implications for enhanced separation and analytical precision. We assessed how specific orientations influence retention times and selectivity during chromatography by employing a series of synthetic peptides with varying sequences and charge characteristics. The results indicate that peptide orientation significantly affects the interaction with the stationary phase, leading to variations in retention times even among peptides with similar net charges. These findings underscore the importance of optimizing peptide orientation to improve separation efficiency and accuracy in peptide analysis. The implications of this research extend to proteomics, biomarker discovery, and drug development, where enhanced selectivity can lead to better identification and quantification of peptides.