higher than for $T=300$ K at any $X_P$.

Another not intuitive result is that at $T=120$ K the adsorption behavior is less regular than at $T=300$ K. For example, at the lowest $X_P=25\%$ the Fib seems to adsorb more than at the highest, $X_P=100\%$, and less than at the intermediate $X_P=50\%$. A similar non-monotonic behavior characterizes also the Alb absorption, but now the $C_A^S$ is higher when $C_F^S$ is lower and vice versa. These results suggest that, under this condition, the strongest competition is between Alb and Fib, because IgG is almost not displaced from the surface. Furthermore, at $X_P=25\%$ Fib does not reach the third step of adsorption, suggesting that the kinetics is so slow that it does not allow the Fib to perform large conformational changes.

Change of the Bioenvironment
----------------------------

Once we have understood that the protein layer covering the surface is controlled by the energy depletion of the system, it is interesting to ask if a sudden change of external conditions could induce a different composition of this layer, determining different biomimetics surface properties. This situation could occur, for example, when a medical device is manipulated in a bioenvironment whose composition is externally controlled during a 