6010
Retention of the normal BRCA1 allele in the tumor with the heterozygous germline BRCA1 mutation , 2418delA , indicated that mutational inactivation of both BRCA1 alleles was not required for tumorigenesis .
 ( DNA: BRCA1 alleles, None) , ( DNA: BRCA1, None) , ( DNA: BRCA1, None) , ( DNA: BRCA1 allele, None) , ( DNA: BRCA1, 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: BRCA1 alleles, None) , ( DNA: BRCA1, None) , ( DNA: BRCA1, None) , ( DNA: BRCA1 allele, None) , ( DNA: BRCA1, None) 