Fibrinogen species as resolved by HPLC-SAXS data processing within the UltraScan Solution Modeler (US-SOMO) enhanced SAS module

The usefulness of a new high-performance liquid chromatography/small-angle X-ray scattering (HPLC-SAXS) data analysis module within the multi-resolution modeling suite US-SOMO is illustrated with size-exclusion small-angle X-ray scattering (SE-SAXS) data of a crude bovine serum albumin sample. The module is then applied to the SE-SAXS study of a human plasma fibrinogen high-molecular-weight fraction presenting severe aggregation problems and a split non-symmetrical main elution peak probably resulting from in-column degradation.

Incorporation of a hydration layer in the `dummy atom' ab initio structural modelling of biological macromolecules

This article discusses the improvement of the ab initio restoration of biomacromolecular structure from small-angle X-ray scattering data, by consideration of an additional type of `dummy atom', representing the hydration layer. The described algorithm has been implemented in the program DENFERT.