6477
We also show that ectopic expression of PU.1 in Xenopus embryos is sufficient to block erythropoiesis during normal development.
 ( protein: PU.1, 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: PU.1, None) 