Squeezing of Oil-Swollen Surfactant Bilayers by a Membrane Protein.

We have performed small angle x-ray scattering experiments on a ternary system made of a nonionicsurfactant, dodecane, and water, in the absence and upon insertion of a transmembrane protein. Incontrast to other proteins or polymers studied, its incorporation reduces the Bragg spacing from 200 Ato 80 A, which scales as