11980
The relative inhibitory activities of these FQ on nuclear TOPO II alpha in cultured Chinese hamster lung fibroblasts ( V79 cells ) over dose ranges and at equimolar concentrations were assessed by measuring nuclear stabilized cleavage complexes of TOPO II alpha - DNA .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None