Computational docking simulation of binding between tyrosinase and PA. The modeled 3D structure of tyrosinase using SWISS-MODEL to assemble 556 amino acids selected with a homology-modeling protocol. Two copper ions (balls) coordinated with six histidines, as indicated the blue colors in the figure. The pink stick is PA as docked by Dock6.3. The green stick is PA as docked by AutoDock4.2.