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Fig. 5. Cells in the lateral root cap fail to express a lateral root cap marker in erh3 mutants. Expression of the J0481::GFP enhancer trap in wild-type (A,C) and erh3-2 mutant (B,D) meristems. (A,B) Projected images of GFP expression in the meristems. (C,D) Transverse sections approximately midway through the lateral root cap: top, PI-stained cell walls; bottom, GFP expression. Scale bar, 50 µm.