2554
Site B ( nt 4519 to 4545 ) specifically bound four distinct nuclear protein complexes : a ubiquitous factor , a T-cell-specific factor , a B-cell-specific factor , and the monocyte/macrophage- and B-cell-specific transcription factor PU.1/Spi-1 .
 ( protein: monocyte/macrophage- and B-cell-specific transcription factor, None) , ( protein: transcription factor, None) , ( protein: nuclear protein complexes, None) , ( protein: B-cell-specific factor, None) , ( protein: T-cell-specific factor, None) , ( protein: ubiquitous factor, None) , ( protein: PU.1/Spi-1, None) , ( DNA: Site B, None) , ( DNA: nt 4519 to 4545, 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: monocyte/macrophage- and B-cell-specific transcription factor, None) , ( protein: transcription factor, None) , ( protein: nuclear protein complexes, None) , ( protein: B-cell-specific factor, None) , ( protein: T-cell-specific factor, None) , ( protein: ubiquitous factor, None) , ( protein: PU.1/Spi-1, None) , ( DNA: Site B, None) , ( DNA: nt 4519 to 4545, None) 