12526
However, during maturation of both lineages (days 21 and 28), increased expression of a functionally distinct 80 kDa STAT5 isoform was observed, resulting in heterodimer DNA-binding complexes containing both the 94 and 80 kDa STAT5 proteins .
 ( protein: 80 kDa STAT5 isoform, None) , ( protein: heterodimer DNA-binding complexes, None) , ( protein: STAT5 proteins, 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:
 ( protein: 80 kDa STAT5 isoform, None) , ( protein: heterodimer DNA-binding complexes, None) , ( protein: STAT5 proteins, None) 