There are, however, clear differences in the onset of transient signatures in the ∆PDFs of αTp with respect to the other two cases. The positive signature at 3.5 Å shows an earlier onset than the negative signatures at the 1.4 Å and 2.4 Å. This behavior is clearly visible by the color-coded bars in Fig. and in the time-dependence of the integrated amplitudes in the three regions as plotted in Fig. .