Fig. 3: Transient absorption time traces in the midinfrared.
From: Confinement in crystal lattice alters entire photocycle pathway of the Photoactive Yellow Protein

Time traces at selected wavenumbers of PYPS (black) and PYPC (red). Note that the time axis is linear until 10 ps (after the maximum of the IRF), and logarithmic thereafter. The PYPS data was scaled lower by a factor of 5 to facilitate comparison.