SAXS data from solutions of macrophage migration inhibitory factor bound to Ceruloplasmin (MIF-CP complex) in 50mM CuSO4, 100mM HEPES, pH 7.4 were collected using a HECUS System-3 instrument (Moscow, Russian Federation) with a linear Braun OED 50M position-sensitive detector at a sample to detector distance of 0.3 m and at a wavelength of λ = 0.154 nm (l(s) vs s, where s = 4πsinθ/λ, and 2θ is the scattering angle). Solute concentrations ranging between 5 and 10 mg/ml were measured at 20°C. One 5400 second frame was collected. The data were normalized to the intensity of the transmitted beam and radially averaged; the scattering of the solvent-blank was subtracted.
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