Abstract
Size-exclusion chromatography (SEC), coupled with “on-line” static laser light scattering (LS), refractive index (RI), and ultraviolet (UV) detection, provides a universal approach for determination of the molar mass and oligomeric state in solution of native proteins as well as glycosylated proteins or membrane proteins solubilized in non-ionic detergents. Such glycosylated proteins or protein-detergent complexes show anomalous behavior on SEC, thus presenting a challenge to determination of molar mass and oligomeric state in solution. In the SEC-UV/LS/RI approach, SEC serves solely as a fractionation step, while the responses from the three detectors are utilized to calculate the molar mass for the polypeptide portion of the native or modified protein. The amount of sugar, lipid, or detergent bound to the polypeptide chain can also be estimated from the SEC-UV/LS/RI analysis.
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Folta-Stogniew, E. (2006). Oligomeric States of Proteins Determined by Size-Exclusion Chromatography Coupled With Light Scattering, Absorbance, and Refractive Index Detectors. In: New and Emerging Proteomic Techniques. Methods in Molecular Biology™, vol 328. Humana Press. https://doi.org/10.1385/1-59745-026-X:97
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DOI: https://doi.org/10.1385/1-59745-026-X:97
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