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Chloroplast ultrastructure in the wild type and yl leaves. (A,B) Transmission electron micrographs (TEM) of chloroplasts in the wild type (A) and yl (B) leaves. (C,D) Magnified images of a chloroplast in the wild type (C) and yl (D) leaves. Arrows show grana. Bar = 0.5 μm in (A,B) and 200 nm in (C,D).
