Techniques / Protein Expression & Analysis

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Article

Extracting Better Ubiquitin Data from Your Samples: Beyond the Cellular Skip

The ubiquitin-proteasome system was discovered at the start of the 1980s, and people have been studying it ever since. Initially, researchers thought that tagging a protein with ubiquitin was the cell’s...
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Examining Cell Interactions with Surface Plasmon Resonance (SPR) and Identifying Epitopes using SPR-Mass Spectrometry (MS)

Surface plasmon resonance (SPR) offers highly efficient, label-free detection for quantifying biomolecular interactions in real-time. Two exciting SPR variants that have sprung up in recent years are SPR for...
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Article

All Charged Up: The Basics of Ion-Exchange Chromatography

Highly pure proteins are vital for successful experiments; they play roles in research as assay reagents (especially for SPR applications), therapeutic candidates, and of course, as the subjects of structural...
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Article

A New Frontier in Protein Quantitation: AlphaLISA

If you ever worked in a biology or biochemistry laboratory, you probably already heard about ELISA. You may have even used it. But do you know what’s behind it? And how you can improve it? Let me guide you...
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Article

How to Scrutinize Your Glycosylated Proteins Without Using Glycosidases

You might have come across protein glycosylation before. Somewhere in the recesses of your memory you might even recall reading something about the protein you’re studying being glycosylated, but what does...
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Key Analytical Challenges for Antibody Drug Conjugates

Currently, there are more than 75 antibody drug conjugates (ADCs) in various stages of pre-clinical and clinical development. The combination of a targeted antibody coupled with a cytotoxic small-molecule drug...
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Ten Ways to Give Your Surface Plasmon Resonance Experiments a Hand

Surface Plasmon Resonance (SPR) is the gold standard for measuring biomolecular binding without the need for labeling (i.e., label free detection of kinetics). SPR is especially valuable because it doesn’t...
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Article

Have a BLAST With Your Protein Sequences

When I was being trained in microbiology as an undergrad, one of the first skills I acquired was the ability to quickly compare and visualize amino acid sequences using BLAST and ClustalW. 15 years later, those...
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Article

Stripping Blots – It’s All Fun and Games Until Someone Loses Their Protein

Like all technical fields, molecular biology contains a very robust “theoretical” realm and an equally robust “practical” realm. Unfortunately, these two existences don’t seem to overlap as often as...
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Article

SDS-PAGE Tips and Tricks to Save You Time

Today, SDS-PAGE is one of the basic methods in biolabs. As a beginner in my lab, I had little help, so my first SDS-PAGE gel took two whole days! Since then, I’ve learned a lot about how to make the process...
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