11234
Using a mitogenically incompetent human G-CSFR mutant in which Pro639 and Pro641 were substituted by alanine , the box 1 PDP motif was found to be required for activation of Jak kinases , tyrosine phosphorylation of the G-CSFR , and recruitment of Stat proteins .
 ( protein: Jak kinases, None) , ( protein: Stat proteins, None) , ( protein: human G-CSFR, None) , ( protein: box 1 PDP motif, None) , ( protein: G-CSFR, None) , ( protein: mitogenically incompetent human G-CSFR mutant, 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: Jak kinases, None) , ( protein: Stat proteins, None) , ( protein: human G-CSFR, None) , ( protein: box 1 PDP motif, None) , ( protein: G-CSFR, None) , ( protein: mitogenically incompetent human G-CSFR mutant, None) 