533
Previous protein-DNA binding studies have shown that HS-40 consists of multiple nuclear factor binding motifs that are occupied in vivo in an erythroid lineage- and developmental stage- specific manner .
 ( DNA: HS-40, None) , ( DNA: nuclear factor binding motifs, 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: HS-40, None) , ( DNA: nuclear factor binding motifs, None) 