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H3 phosphorylation during Tetrahymena meiotic prophase. Early conjugating Tetrahymena cells were stained with the phosphorylated H3 antibody (B, D, F, H, and J) and DNA-specific dye DAPI (A, C, E, G, and I). The bar represents 10 μm. Numbered stages correspond to those described in ref. 31.
