Fig. 3: PyMOL computational images of the surface charge on the four proteins tested.

a Myoglobin, b BSA, c ubiquitin and d cytochrome c. Positive surface charge is shown in blue, negative surface charge is shown in red. Protein computational images were produced using PyMOL v2.5 software and the Adaptive Poisson-Boltzmann Solver (APBS) electrostatic plugin.