The UDG and AAG families contain small, compact glycosylases, whereas the MutM/Fpg and HhH-GPD families comprise larger enzymes with multiple domains.
As familias UDG e AAG comprenden glicosilases compactas pequenas, mentres que as familias MutM/Fpg e HhH-GPD comprenden encimas máis grandes e con moitos dominios.