This active site is bordered by Phe266, Trp280, and Leu282, which pack tightly with the hydrophobic side of the AP site, discriminating against sites that do have bases.
Este sitio activo está limitado pola Phe266, o Trp280, e a Leu282, que se empaquetan estreitamente co lado hidrofóbico do sitio AP, evitando os sitios que si teñen bases.