12719
Likewise, the level of expression of the erythroid transcription factors GATA-1 , GATA-2 , NF-E2 , SCL and RBTN2 , all expressed in untreated K562 cells , did not increase during sodium phenylacetate induced erythroid differentiation .
 ( protein: GATA-1, None) , ( cell line: K562 cells, None) , ( protein: erythroid transcription factors, None) , ( protein: SCL, None) , ( protein: NF-E2, None) , ( protein: RBTN2, None) , ( protein: GATA-2, None) , ( protein: transcription factors, 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: GATA-1, None) , ( cell line: K562 cells, None) , ( protein: erythroid transcription factors, None) , ( protein: SCL, None) , ( protein: NF-E2, None) , ( protein: RBTN2, None) , ( protein: GATA-2, None) , ( protein: transcription factors, None) 