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Fig. 3. Rhizoid cells of wild type and Pphb7 disruptant. (A) A wild-type rhizoid composed of 4 cells, viewed with Nomarski optics. The single asterisk indicates a rhizoid apical cell and the double asterisk indicates a rhizoid subapical cell. (B-G) A rhizoid composed of 8 cells in wild type (B-D) and Pphb7dis-3 (E-G). The apical cell (B,E), third cell (C,F), and fifth cell (D,G) viewed with Nomarski optics (right), and imaged under UV excitation (left). The arrowheads indicate septa between the cells. Scale bar: in A, 100 µm for A; in B, 50 µm for B-G.