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Fig. 2. Ectopic KNOX accumulation in semaphore1 mutant seedlings. Immunohistolocalization of vegetative shoots using a polyclonal KNOX antibody. (A,D) non-mutant siblings, (B,E) moderate sem1 mutant seedling, (C,F) severe mutant seedling. The arrows in D and E indicate the position of the incipient leaf primordium (labeled 0); the two youngest leaf primordia in E are numbered. The arrow in F indicates the expected position of the shoot apex. Scale bars: 200 µm, in A for A-C and in D for D-F.