Synchrotron SAXS data from solutions of angiopoietin-like protein 3 in 20 mM Tris-HCl pH 7.5, 400 mM NaCl, 2% glycerol, pH 7.5 were collected on the 12.3.1 (SIBYLS) beam line at the Advanced Light Source (ALS, Berkeley, CA, USA) using a Pilatus3 X 2M detector at a sample-detector distance of 1.5 m and at a wavelength of λ = 0.07 nm (I(s) vs s, where s = 4πsinθ/λ, and 2θ is the scattering angle). In-line size-exclusion chromatography (SEC) SAS was employed. The SEC parameters were as follows: A 80.00 μl sample at 6.2 mg/ml was injected at a 0.50 ml/min flow rate onto a Shodex KW-800 series column at 25°C. 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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