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Abstract：
This article describes the purification and scale-up of ISIS 2302, a 20-mer phosphorothioate oligonucleotide by anion-exchange (AX) chromatography. The key operating parameters were optimized at gram scale and further scaled up to hundred gram. SOURCE 30Q, a high efficiency polymeric chromatographic media was used for both the small and large-scale work. High length-based purity and yield were maintained at scale-up. This purification is one of the largest demonstrations of AX purification of phosphorothioate oligonucleotide.
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