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We first observed that : ( i ) siRNA lipoplexes - induced toxicity was cell line dependent , tumoral cell lines being the more sensitive ; and ( ii ) plasmid DNA - containing siRNA lipoplexes were more toxic than polyglutamate - containing ones or cationic liposomes .
 Chemical: polyglutamate
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: polyglutamate