Chromatography

Protein purification becomes a challenging step for applications requiring high protein concentrations (such as structural biology studies). This is also true for researchers purifying integral membranes proteins and untagged proteins from native sources. Here we provide some useful tips for selecting the proper resins, optimizing conditions and developing effective strategies to tackle the challenges associated with such difficult-to-purify proteins.

Multicolumn purifications are tedious and the manual operations during this process introduce variabilities, affecting the success of purification and reproducibility of results. This whiteboard animation explains how an automated multi-dimensional chromatography method can make this an easier process with very high success rates.

The separation of monomers from product-related impurities is quite challenging in process separations. It requires a thorough screening and an efficient resin to get efficiency in the purification process. Review the performance data of Bio-Rad’s mixed mode CHT™ Ceramic Hydroxapatite in achieving process separation efficiency and how it compares with various Capto media.

The best chromatography media should yield high protein purity and product recovery as well as be versatile enough to purify difficult samples. Bio-Rad’s CHT™ Ceramic Hydroxyapatite achieves this by virtue of being able to interact with the proteins through multiple modes, making the process extremely efficient. The whiteboard animation describes the mode of action of CHT.

What can chromatography peaks tell us? From the quality of column packing to the purity of separated proteins, a lot can be gleaned from the peaks. Here are some definitions that can help decipher what chromatography peaks can tell us.

Processivity is the rate at which nucleotides are added to extend PCR products. High processivity results in a greater number of nucleotides incorporated in each polymerase binding event.

From making sure that your lysis buffer is compatible with your protein quantitation method to advice on when you do and don’t have to worry about proteases, we share helpful tips for developing a sample preparation protocol.

Sonicator or freeze-thaw? Detergent or enzymatic lysis? Find out how to pick the right cell disruption method for your experiment.

Some of the frustrations in protein purification stem from unmet chromatography needs, such as automation, productivity, throughput, and reproducibility among others. Bio-Rad’s new Multi-D chromatography method addresses these and provides solutions to faster, efficient and more reliable protein purification.

What is Multidimensional (Multi-D) chromatography? Here is an animated explanation of how Multi-D chromatography works and what its advantages are over traditional chromatography.