12802
The beta-casein promoter has been widely used to monitor the activation of STAT (signal transducer and activator of transcription)5 since STAT5 was originally found as a mediator of PRL-inducible beta-casein expression .
 ( protein: STAT (signal transducer and activator of transcription)5, None) , ( protein: beta-casein, None) , ( protein: STAT5, None) , ( protein: beta-casein, None) , ( DNA: beta-casein promoter, 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: STAT (signal transducer and activator of transcription)5, None) , ( protein: beta-casein, None) , ( protein: STAT5, None) , ( protein: beta-casein, None) , ( DNA: beta-casein promoter, None) 