Figure 5.

Scattering from an isotropic suspension containing bundles of SJW1660 straight flagellar filaments in 100 mM NaCl. The bundles were assembled using a 5 wt % PEG (molecular mass, 20 kDa) concentration, corresponding to an osmotic pressure of 47 kPa (20). (A) Two-dimensional x-ray scattering image. (B) Azimuthally integrated scattering intensity as a function of q. The experimental measurements (black squares) were fitted to our computational hexagonal lattice model (red curve) with a lattice constant of $a=23.5\text{nm}$. Good agreement can be seen over a wide q-range in both the location and magnitude of the peaks, whose indexes are indicated in brackets. To see this figure in color, go online.