<p>All cells in the clonal CNTF-NS cell line expressed the reporter gene Venus (a) and showed CNTF-immunoreactivity in the perinuclear region (b). Control-NS cells, in comparison, expressed the reporter gene tdTomato (c) but lacked detectable expression of the cytokine (d). CNTF, ciliary neurotrophic factor; DAPI, 4’,6-diamidino-2-phenylindole. Bar in d (for a-d): 20 μm.</p