**4. Conclusions**

In the present work, through the mathematical simulation and analysis of the molecular coupling of the enzyme to cellulose, by the docking technique, the enzymes with the best coupling between the enzyme-cellulose complexes were aspartate, glutamate, and asparagine.

From the paper deinking experiments using these enzymes, the chemical mixture of the three amino acids results in the highest values of optical properties of the paper sheets formed with the deinked fibers: ISO whiteness or brightness (90.8), reflectance (34.7), opacity (89.9), and tonality (L\* = 95,3, a\* = 1.7, and b\* = −4.52), being these values higher than those obtained through conventional methods.

It is worth mentioning the importance of the flotation column during the deinking, due to the fact of the number of bubbles available for capturing the ink particles.
