Experimental SANS data of HTL in DDM, fits to data, and pair distance distribution functions p(r) for data and models. (A) Shown is a fit to data with HTL-F (no lipids) in red and HTL-I (no lipids) in blue and the most probable fit in green for α = 30 (see text), with 18 lipids in the core, 58% in the HTL-F-L form and 42% in the HTL-I-L form, and with ∼1% of the total protein being aggregated. (B) Shown is the p(r) plot of data and models with the same colors. Inset shows the HTL-F-L in cartoon representation (orange) with a lipid core representative of 18 lipids (blue and white). Lipid bilayer planes are marked in red (periplasmic side) and blue (cytoplasmic side). To see this figure in color, go online.