13233
In mice a 15-lipoxygenase is not expressed, but a leukocyte-type 12-lipoxygenase is present in peritoneal macrophages .
 ( cell type: peritoneal macrophages, None) , ( protein: leukocyte-type 12-lipoxygenase, None) , ( protein: 15-lipoxygenase, 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:
 ( cell type: peritoneal macrophages, None) , ( protein: leukocyte-type 12-lipoxygenase, None) , ( protein: 15-lipoxygenase, None) 