11101
Recently, we have developed a quantitative assay using competitive reverse transcriptase polymerase chain reaction that estimates the number of AML1 /ETO transcripts in t(8;21) acute myelogenous leukemia ( AML ), in order to determine the degree of leukemic cell contamination in PBSC harvests , and to monitor minimal residual disease ( MRD ) quantitatively in patients with t(8;21) AML .
 ( RNA: AML1 /ETO transcripts, None) , ( cell type: PBSC, None) , ( DNA: AML1, None) , ( protein: reverse transcriptase polymerase, 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:
 ( RNA: AML1 /ETO transcripts, None) , ( cell type: PBSC, None) , ( DNA: AML1, None) , ( protein: reverse transcriptase polymerase, None) 