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Relative DNA staining in nuclei from green leaf (A) or red bract tissue (B) of Euphorbia pulcherrima chopped alone, or in ‘co-chopped’ mixtures processed in the order green leaf first and red bract second (C), red bract first and green leaf second (D), or when samples C and D were combined and run immediately after (E), or run 2 h later (F). The mean relative absorbance for nuclei in each peak is given.
