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A fully automated three-step protein purification procedure for up to five samples using the NGC chromatography system.
Protein Expression and Purification 2018 August 11
The drug discovery process in the biopharmaceutical industry usually starts with the generation of plasmids coding for certain proteins. Due to advances in cloning techniques the generation of thousands of different plasmids is not a limiting factor anymore. The next step is the expression and evaluation of the proteins. In recent years significant progress has been made in the miniaturization of protein expression and purification. These processes have been adapted to robotic platforms and hundreds of proteins can be expressed and purified in parallel. As a consequence of miniaturization, the protein purification is restricted to a one-step process. In addition the amount of purified protein is usually in the μg-range. This might be suitable if a sensitive initial screening assay is available. However, when larger amounts of proteins are required robotic platforms are no longer appropriate. In addition, a one-step purification procedure is often not sufficient to obtain pure protein preparations. To address this topic we have used the NGC chromatography system for automated purification of up to five samples using a three-step purification procedure. The first chromatographic step is the capture step followed by a desalting step. The final purification was done using size exclusion chromatography. This set-up reduces the overall-time needed for protein production, needs minimal operator invention, is easy to handle and thus increases the throughput.
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