6753
In this study, we found that p47phox , an activator of the phagocyte NADPH oxidase , binds to this portion by the two-hybrid system .
 phagocyte NADPH oxidase
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:
 phagocyte NADPH oxidase