title: A label-free methodology for selective protein quantification by means of absorption measurements.
abstract: The application of high throughput experimentation (HTE) in protein purification process development has created an analytical bottleneck. Using a new label-free and non-invasive methodology for analyzing multicomponent protein mixtures by means of spectral measurements, we show that the analytical throughput for selective protein quantification can be increased significantly. An analytical assay based on this new methodology was shown to generate very precise results. Further, the assay was successfully applied as analytics for a resin screening performed in HTE mode. The increase in analytical throughput was obtained without decreasing the level of information when compared to analytical chromatography. This proves its potential as a valuable analytical tool in conjugation with high throughput process development (HTPD). Further, fast selective protein quantification can enhance process control in a commercial production environment and, hence, minimize the need for off-line release analysis.
authors.affiliation: Institute of Engineering in Life Sciences, Section IV: Biomolecular Separation Science, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany.
authors.forename: Sigrid K
authors.initials: SK
authors.lastname: Hansen
authors.forename: Erik
authors.initials: E
authors.lastname: Skibsted
authors.forename: Arne
authors.initials: A
authors.lastname: Staby
authors.forename: Jürgen
authors.initials: J
authors.lastname: Hubbuch
mesh_terms: D002623:Chemistry Techniques, Analytical; D057166:High-Throughput Screening Assays / Q000379:methods*; D011506:Proteins / Q000032:analysis*; D013057:Spectrum Analysis / Q000379:methods*; D013194:Staining and Labeling / Q000379:methods
chemical_list: D011506:Proteins