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Transmission electron micrographs of chloroplasts from the sixth leaves of 3- to 5-week-old Col and sg1 plants. (A, E, I) Chloroplast structures from the wild-type plants. (B–D), (F–H), and (J–L) Chloroplast structures from the sg1 mutant plants. Cp, chloroplast; SG, starch grain; Thy, thylakoid; Gr, grana thylakoids. Bars=1 μm.
