ResourceLife Sciences
Effective site-specific isotopic labeling and expression optimization using BioExpress 2000 Media
24 Nov 2025Recombinant genes have been expressed in a variety of cellular systems for decades to generate protein reagents that are the potential targets for new small-molecule drugs. As these targets become more complex, researchers have developed innovative methods to study the structure of these proteins and the interactions with potential drugs. Cambridge Isotope Laboratories, Inc.’s (CIL) BioExpress® 2000 media incorporates isotope-labeled amino acids into recombinant protein expressed in baculovirus-infected (BV) insect cells to assist NMR structural studies. To use this labeled media most efficiently, expression conditions must be optimized at a small scale prior to production.
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NMR and EPR SpectroscopyNuclear magnetic resonance (NMR) spectroscopy is used to resolve the local chemical environment of atomic nuclei with spin, revealing information on molecular structure, dynamic processes and chemical reactions of organic molecules, from proteins to synthetics. Electron paramagnetic resonance (EPR) also known as electron spin resonance (ESR) spectroscopy is used to detect and quantify paramagnetic species in a sample, including free radicals as transition metal ions. By immersing the sample in a strong magnetic field, both NMR and EPR spectrometers probe the sample with either radio waves or microwaves respectively. A range of benchtop, solid-state and time domain NMR spectrometers & EPR spectrometers are available, as well as NMR tubes, NMR solvents, software, coils, and magnets. Find the best NMR & EPR equipment in our peer-reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.ProteomicsProteomics is the systemic bioinformatics study of proteins and amino acids, including their structure, size, function and identification. Tools used in proteomics include chromatography, blotting and gels, protein arrays, mass spectrometry and ELISA and associated analysis software. Analyzers and proteomic systems should be sensitive, high resolution, fast and may be automated for high-throughput.Protein ExpressionProtein expression is the utilization of cell machinery for the synthesis of proteins and has become a critical tool in biotherapeutic, genomic, and proteomic research. Produce recombinant proteins with expression vectors in combination with a host cell suitable for high-level protein expression. For production of toxic proteins, consider cell-free expression vectors. Create and monitor post-translational modifications with protein modification kits. Find the best protein expression products in our peer-reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.Protein StructureProtein structure refers to the three-dimensional arrangement of amino acids in proteins, determining their function. Understanding protein structure is key in drug discovery, enzymology, and molecular biology. Explore protein structure analysis tools in our peer-reviewed product directory; compare products, check reviews, and get pricing directly from manufacturers.Recombinant ProteinsNMR