13787
Surprisingly, however, removal of PC4 from the unfractionated nuclear extract has no detrimental effect on OCA-B / Oct-1 -dependent transcription .
 PC4, Oct-1, OCA-B
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 PC4, Oct-1, OCA-B