3921
Cloning and characterization of the beta subunit of human proximal sequence element -binding transcription factor and its involvement in transcription of small nuclear RNA genes by RNA polymerases II and III .
 ( protein: beta subunit, None) , ( protein: human proximal sequence element -binding transcription factor, None) , ( DNA: human proximal sequence element, None) , ( DNA: small nuclear RNA genes, 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: beta subunit, None) , ( protein: human proximal sequence element -binding transcription factor, None) , ( DNA: human proximal sequence element, None) , ( DNA: small nuclear RNA genes, None) 