| Popis: |
With increasing demands on protein analyses in complex biological matrices, the insistence on developing new sample preparation techniques is rising. Recently, we introduced a new displacement electrophoresis technique (epitachophoresis) and instrumentation for preparative concentration and cleaning of DNA samples. This work describes the possibility of applying this device to protein samples. We have developed a method for the epitachophoretic concentration of proteins in a cationic mode and tested it by concentrating and collecting the protein zones from complex biological matrices (urine and growth medium). Under optimized conditions, we have obtained recoveries up to 99%. Furthermore, the applicability of the developed method was proven by concentrating and collecting the cytochrome c zone from a HeLa cell line growth medium, where the protein cytochrome c was released during cell apoptosis. |
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