12854
Accordingly, an expanded survey in lymphoid malignancies showed that BCL-6 mutations are restricted to B cell tumors displaying GC or post-GC phenotype and carrying mutated Ig variable heavy chain sequences .
 ( DNA: mutated Ig variable heavy chain sequences, None) , ( protein: BCL-6, 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: mutated Ig variable heavy chain sequences, None) , ( protein: BCL-6, None) 