Biophysical characterization of HNF-1A R263C and N266S.A, DLS curves for DBD and DD-DBD variants. B, SEC-MALS elution profiles for DBD and DD-DBD variants. Red line: molecular weight based on MALS and refractive index. C, SRCD spectra for DBD and DD-DBD variants. D, SAXS scattering curves for DBD and DD-DBD variants. E, SAXS distance distribution functions for DBD and DD-DBD variants. F, dimensionless Kratky plot for DBD variants, with the cross indicating the expected maximum for a globular particle (√3, 1.104) (61). DBD, DNA-binding domain; DD, dimerization domain; DLS, dynamic light scattering; HNF-1A, hepatocyte nuclear factor 1A; SAXS, small-angle X-ray scattering; SEC-MALS, size-exclusion chromatography–multi-angle light scattering; SRCD, synchrotron radiation circular dichroism.