Multiexponential fit of the observed kinetic profiles shown in Fig. 2 recorded in the Tf-trHb-CO complex.

First line indicates: probe wavelength (λprobe), time constant (τ) and amplitude (A). The analysis of the time dependent signals has been done by fitting the convolution of the instrumental function (FWHM = 160 fs) with: . Decay processes correspond to positive amplitude while rise processes are associated with negative amplitudes. The opposite is true for the bleaching signal at 420 nm. The value of τ3 is reported in brackets to indicate that this parameter has a large degree of uncertainty.