29238
WT MEFs ( wild - type mouse embryonic fibroblasts ) and tumorigenic cell lines p53 ( - / - ) + H - RasV12 and p53 ( - / - ) + p53 ( N236S ) + H - RasV12 were used for evaluating active structures , targeting p53 ( N236S ) ( corresponding to p53 ( N239S ) in humans ) mutation .
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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:
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