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Mass General Brigham
and likely the U.S
But for a single overnight on the counter at normal room temperature, you are fine
The chromatographic ion exchange resin is chosen depending on the specific GLP-1 peptide to be purified and the conditions employed, such as pH, buffer, ionic strength etc., which are known to the person skilled in the art (that is, typically, pH below the isoelectric point (pl) of the GLP-1 peptide for cation exchange resins and pH above pl of the GLP-1 peptide for anion exchange resins, a sufficient buffer strength to maintain the desired pH, and a sufficiently low ionic strength possibly induced by the salt concentration), and includes but is not limited to Sepharose resins, Sephadex resins, Streamline resins, and Source resins from Amersham-Pharmacia Biotech, HyperD resins, Trisacryl resins, and Spherosil resins from BioSepra, TSKgel resins and Toyopearl resins from TosoHaas, Fractogel EMD resins from Merck, Poros resins from Perseptive Biosystems, Macro-Prep resins from BioRAD, Express-ion resins from Whatman etc
