Electrical coupling across developmental boundaries in insect epidermis.

摘要: THE polarity of the surface folds on abdominal cuticle insect Rhodnius which normally run at right angles to antero-posterior axis, is controlled by underlying epidermal cells. When portions integument are transplanted or rotated cells produce orientation shows that “remember”, least some extent, their original polarity1,2. Such experiments also suggest have access information defines spatial pattern differentiation within each segment3. It has been suggested a gradient property exists reiterated from segment so intersegmental border intervenes between “high” part one and “low” next. In model segmental viewed as concentration diffusible morphogen2–5. Studies in closely related shown very early stage segments independent lineages, clones stopping abruptly border5,6.