11206
These observations provide further evidence to suggest a role for intracellular oxidant generation as a regulatory mechanism during cell cycle entry , and establish a link between oxidative signalling and other aspects of the intracellular signalling network that is activated in response to mitogenic stimulation .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
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