Synchrotron SAXS data from solutions of Tte-WT-apo-HT in 50 mM potassium phosphate, 2 mM MgCl2, 50 mM KCl, pH 6.5 were collected on the BL19U2 beam line at the Shanghai Synchrotron Radiation Facility (SSRF; Shanghai, China) using a Pilatus 1M detector at a wavelength of λ = 0.1037 nm (I(s) vs s, where s = 4πsinθ/λ, and 2θ is the scattering angle). 20 successive 1 second frames were collected at 60°C. The data were normalized to the intensity of the transmitted beam and radially averaged; the scattering of the solvent-blank was subtracted.