Figure 3 - full size

Figure 3. Figure 3. Anisotropic temperature factors reflect coherent motion of the N-domain. The anisotropic ellipsoids of motion at the 90% probability level for the a-carbon atoms of helices aN1 and aN2 highlight the mobility of the main-chain atoms of the N-domain. The principal axes of vibration along both of the helices are largely coherent ( vert, similar up and down; compare with the ellipsoids near residue 1). The direction of this motion (presumably trapped substrates in the crystal) is similar to that seen between the apo and GDP complex crystal structures.