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We have isolated and characterised diploid and tetraploid clones from the normally heterologous Spodoptera frugiperda (Sf-9)cell line by dilution cloning technique. Tetraploid clones were found to have cell sizes in excess of 35% larger than that of the diploid clones. In contrast, the maximum cell numbers achieved in batch cultures of diploid clones were on average 185% higher than the tetraploid...
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