Deletion of sequences from 0 to 17kb (coordinates with respect to proximal end of a cloned l(2)gl region, close to the tip of 2L).
DNA coordinates, with respect to origin at tip of 2L: 17.4
HeT-A elements and TART-element sequences are present at the recessed tip of Df(2L)U258 and Df(2L)U231 but not Df(2L)l(2)gl-9 and Df(2L)GB26.
Isolated from a natural population in Sonoma County, CA, USA.