Comparison of CE-SDS and SDS-PAGE Methods

This application note presents a detailed comparison of two protein analysis methods: capillary electrophoresis-sodium dodecyl sulfate (CE-SDS) and sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE). The objective is to highlight the advantages of CE-SDS, particularly in terms of precision, quantitation, and automation. CE-SDS is described as a streamlined alternative to the labor-intensive SDS-PAGE, offering higher reproducibility and eliminating variability associated with manual staining and band interpretation. The document outlines the methodologies used for analyzing monoclonal antibodies and adeno-associated viruses (AAV) using both techniques, detailing sample preparation, instrument setup, and data analysis processes. Results indicate that CE-SDS provides superior resolution and sensitivity, allowing for the detection of minor peaks that SDS-PAGE fails to identify. The findings underscore the potential of CE-SDS for analytical applications in regulated environments, particularly within the biopharmaceutical industry.