8712
We suggest that extinction of Ig genes is part of a global mechanism that suppresses the differentiation program foreign to the HeLa phenotype .
 ( cell line: HeLa phenotype, None) , ( DNA: Ig genes, 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 line: HeLa phenotype, None) , ( DNA: Ig genes, None) 