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sad3 and sad4 Mutants Have Membrane Trafficking Defects.
Transmission electron micrographs of cross sections of the epidermal cells of roots of 2-d-old wild-type (A) and sad3 mutant ([B] and [C]) seedlings in the meristematic zone. C, cortex; E, epidermis; N, nucleus. Arrows indicate wavy/thickened appearance of cell margins (B) and sac-like structures (C) in sad3 mutants. Bars = 2 μm (A), 6 μm (B), and 1.8 μm (C).
