Figure 3.

The SAXS solution structure of the TsaB₂D₂ complex. (A) Comparison of the solution scattering curve (black circles) and the theoretical scattering curves calculated from various attempted models (colored lines), and associated chi values. (B) Comparison of the P(r) functions calculated from the experimental data (black circles) and the theoretical scattering curves (colored lines), showing best fit to the two-state model. (C) Ribbon diagrams of the two states of the TsaB₂D₂ complex in the two-state model. The TsaB and TsaD subunits are colored in two shades of blue and magenta, respectively. The numbers in parentheses represent the relative abundances of the states in solution. The distanced between the centers of mass of the TsaD subunits are shown. (D) Ab initio reconstruction of the molecular envelope of the TsaB₂D₂ complex (gray surface) calculated from the SAXS data and overlaid on states I and II in magenta and yellow, respectively.