Additional file 1.

Lung neuroendocrine cells were not targeted by the Tbx4 lung enhancer, shown by co-immunostaining of GFP (green) and CGRP (red) for E18.5 lung tissue section of the triple transgenic mouse (Tbx4-rtTA/TetO-Cre/mT-mG) with Dox induction from E6.5 to E18.5. Blue: DAPI nuclear counterstaining.

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Zhang et al. BMC Biology 2013 11:111   doi:10.1186/1741-7007-11-111