surgery [@Cloud2008]. In particular, we study the case in which the system is first equilibrated under energy-depleted conditions and subsequently undergoes a sudden change that reestablishes the normal conditions (Fig. \[f6\]).

![The surface concentrations $C_i^S$, as a function of time for $X_P=100\%$, is drastically affected when the system undergoes a sudden change from en energy-depleted condition to a normal condition. The vertical dashed line marks the time $t_0$ of the change. We control the energy of the solution by changing the external parameter $T$ from $T=120$ K to $T=300$ K. Errors and symbols are as in Fig. \[f1\].[]{data-label="f6"}](Fig6)

At short times the energy-depleted system evolves until the equilibrium concentrations are reached. Under these conditions, as discussed (Fig. \[f2\]), the dominant protein is IgG instead of Fib. At time $t_0$ we switch to normal conditions, forcing the system out of equilibrium. As a consequence, the system re-enters a transitory situation in which the concentrations $C_i^S$ evolve until they reach their new equilibrium values at long times. In the specific case considered here, we observe a fast change in the surface concentrations, with $C_F^S$ of Fib overcoming $C_I^S$ of IgG, being the first, under normal conditions, more stable on the surface than 