low rates would decrease the statistics of our MD simulations. We, therefore, perform our simulations in conditions that are closer to those of practical interest, with $X_P$ as high as $100\%$, $50\%$ and $25\%$, by considering different sizes of the simulation box while keeping constant the initial number of proteins, their relative proportions, and the size of the adsorption surface. For each $X_P$ we average the results over fourteen independent runs, starting from independent initial configurations that have been equilibrated by applying pbc in any direction.

Results and Discussion
======================

Competitive Adsorption
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We find that protein surface concentrations $C^S_i$, for Alb and IgG, are non-monotonic in time (Fig. \[f1\]). In particular, for any considered $X_P$, Alb is the first protein that reaches the surface, due to its larger diffusive constant. This property induces an increase of $C^S_A$. When the second fastest and second most affine protein, IgG, diffuses to the surface, it displaces Alb, leading to a decrease of $C^S_A$ and an increase of $C^S_I$. Finally Fib, which is the slowest and most affine protein to the surface, takes over decreasing $C^S_I$ and increasing $C^S_F$. Each $C^S_i$ saturates toward an equilibrium value at long times, while the total surface 