A successful combination: Coupling SE-HPLC with SAXS

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Abstract

A monodispersed and ideal solution is a central (unique?) requirement of SAXS to allow one to extract structural information from the recorded pattern. On-line Size Exclusion Chromatography (SEC) marked a major breakthrough, separating particles present in solution according to their size. Identical frames under an elution peak can be averaged and further processed free from contamination. However, this is not always straightforward, separation is often incomplete and software have been developed to deconvolve the contributions from the different species (molecules or oligomeric forms) within the sample. In this chapter, we present the general workflow of a SEC-SAXS experiment. We present recent instrumental and data analysis improvements that have improved the quality of recorded data, extended its potential and turn it into a mainstream approach. We describe into some details two specific applications of SEC-SAXS that provide more than just separating associated forms from the particle of interest.

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Pérez, J., & Vachette, P. (2017). A successful combination: Coupling SE-HPLC with SAXS. In Advances in Experimental Medicine and Biology (Vol. 1009, pp. 183–199). Springer New York LLC. https://doi.org/10.1007/978-981-10-6038-0_11

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