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mRNA adsorbed onto DOPC / DC - Ch liposomes showed translational activity , while DOPC / DOTAP liposomes inhibited mRNA translation in proportion to its adsorption onto membranes .
 DOPC, DC - Ch, DOPC, DOTAP
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 DOPC, DC - Ch, DOPC, DOTAP