2401
The protein tyrosine kinase activity of the v-abl oncogene has been demonstrated to subvert the normal second messenger systems used by lymphoid cells for growth and differentiation .
 ( DNA: v-abl, None) , ( DNA: v-abl oncogene, None) , ( cell type: lymphoid cells, None) , ( protein: protein tyrosine kinase, 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:
 ( DNA: v-abl, None) , ( DNA: v-abl oncogene, None) , ( cell type: lymphoid cells, None) , ( protein: protein tyrosine kinase, None) 