Figure 6. Amplitude of internal motion as 1−F_int(Q,∞)/(F_int(Q,0).

The result of various models describing the internal dynamics by nine degrees of freedom (dof 9, red squares), as independent particles (msd, black circles) and by six degrees of freedom with the displacements along the spring fixed (dof 6, green triangle). The dispersion of 9 (black solid line) is composed of the individual contributions of displacements perpendicular (dashed, grey) and in the plane (dashed, red) and along the linker (dashed, green). Restricting the movements along the linker to six dof shows smaller amplitudes at larger Q corresponding to the stronger contribution of the movements along the linker above 1.3 nm⁻¹. Adding hinge bending within the Fab fragments to the dof 9 model (dash-double-dotted, blue) shows stronger amplitude around 1.3 nm⁻¹ in correspondence to the single contribution (dash-dotted, blue). A fit with this model reduces the hinge contribution to small amplitudes.