13531
Apoptosis , as indicated by a significant release of cytochrome c from mitochondria into the cytosol , observed in DMBA - injected rats was positively significantly correlated with the elevation of the level of NO .
 DMBA, NO
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 DMBA, NO