The Purification Insights Blog

QuickTip #5: Filter everything

Posted by The Bio-Works Team on Nov 26, 2019 11:45:00 AM

Filtering is crucial in order to protect the packed column from all solid particles in feeds or eluents. Clogging of the column will increase back-pressure and disturb the feed loading zone causing reduced resolution and it is a common problem...

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Topics: Quick Tips, Tips and Tricks, Ion exchange chromatography, IEX, Resin fouling, IMAC, Filter, SEC

QuickTip #3: optimizing mAb purification

Posted by The Bio-Works Team on Oct 14, 2019 1:38:24 PM

Designing an optimized purification process means maximizing yield and purity, and at the same time controlling costs. So, you remove a lot of bulk impurities during the first steps, and focus on high yield steps at the end, when every gram is precious. If you’re purifying mAbs, it would also be good to remove impurities before affinity chromatography to protect the protein A column and reduce the need for cleaning in place (CIP).

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Topics: Quick Tips, mAbs, Tips and Tricks, Ion exchange chromatography, guard column, Multimodal

QuickTip #2: choosing IEX resin

Posted by The Bio-Works Team on Sep 12, 2019 11:55:00 AM

Recovery of the biological activity of your target substance is a priority, and it’s important to check for its pH and ionic strength stability values...

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Topics: Quick Tips, Tips and Tricks, Ion exchange chromatography, IEX

QuickTip #1: cleaning IEX columns

Posted by The Bio-Works Team on Sep 5, 2019 3:23:49 PM

When an IEX resin has been used for some time, impurities may build up in the column causing loss of resolution or increase in back pressure (shown on the pressure monitor or seen by gap formation on the top of the column)...

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Topics: Quick Tips, Tips and Tricks, Ion exchange chromatography, IEX, Cleaning in place

How to improve process efficiency and economy in peptide production

Posted by The Bio-Works Team on May 16, 2019 11:29:13 AM

The purity requirements for therapeutic peptides are very stringent, but synthesis generates a crude peptide mixture containing failed sequences and chemical variants, while recombinant peptides have a considerable bioburden from the host cell. These crude feeds can foul the reverse phase chromatography (RPC) columns commonly used in peptide purification. Introducing an orthogonal purification step upstream significantly reduces the burden on the expensive high performance RPC column, increases the peptide yield and purity, and also prolongs column lifetime.

 

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Topics: Ion exchange chromatography, guard column, Peptides, Peptide drugs, Cleaning in place, Bioburden, RPC

Optimizing mAb purification using a guard column

Posted by The Bio-Works Team on Feb 11, 2019 4:11:57 PM

What are the benefits of introducing multimodal ion exchange chromatography as a guard column and could they include a significant increase in mAb purity? This article presents a study in which two protein A affinity chromatography resins were compared to see whether the introduction of a guard column could improve mAb purity and to discover which of the protein A resins produced the best results.

 

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Topics: mAbs, Ion exchange chromatography, guard column, Multimodal, WorkBeads TREN

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