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Two-step chromatographic purification of pIVTeGFP-transcribed mRNA with post-transcriptional capping

In mRNA production process, downstream purification of in vitro transcription (IVT) reaction often relies on precipitation methods which cannot provide resolution, recovery, or reproducibility to consistently produce a safe and effective product with good process economics. mRNA is a large biomolecule (mass of 1000 nt is ~ 150 kDa and >100 nm in diameter) for which porous particle chromatography lacks the ability to support high capacity and throughput to achieve good process economics. Convective flow chromatography media (e.g. monoliths) is an optimal platform for purification. A fully scalable chromatographic purification process is presented for a posttranscriptionally capped in vitro transcribedmRNA.