13240
The data presented here indicate that (1) the 12-lipoxygenase activity of murine macrophages is upregulated in vitro and in vivo by IL-4 and/or IL-13 , (2) this upregulation requires expression of the transcription factor STAT6 , and (3) the constitutive expression of the enzyme appears to be STAT6 independent .
 ( protein: STAT6, None) , ( protein: transcription factor, None) , ( protein: STAT6, None) , ( protein: IL-4, None) , ( protein: 12-lipoxygenase, None) , ( protein: IL-13, None) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: RNA,cell type,protein,cell line,DNA, Arguments type: . 
Text: {0} 
Answer:
 ( protein: STAT6, None) , ( protein: transcription factor, None) , ( protein: STAT6, None) , ( protein: IL-4, None) , ( protein: 12-lipoxygenase, None) , ( protein: IL-13, None) 