Exeptionaly large abelian unipotent subgroups in groups of Lie type

Let G be a group of Lie type over a finite field K and let U be its unipotent subgroup. In the connectoin to the problem of description of large abelian subgroups in the group U of eXceptional type, we discover large abelian subgroups in the group U of type 2Е 6, which are not G-ajoint to a normal subgroup in U. Some results on the Thopson subgroup are revised.