Representative fluorescence anisotropy curves for binding of
U2AF65 variants to the polyuridine fluorescein-U20
RNA. Solid lines correspond to the fit of the data using the
model described under “Results” with the program Prism4 (Graphpad,
Inc.). The average KD and standard deviation of two
experiments are given. A, wtU2AF65R12; B,
wtU2AF65R123; C, ptbU2AF65R12; D,
dU2AF65R12. a.u., arbitrary units.