13787
Surprisingly, however, removal of PC4 from the unfractionated nuclear extract has no detrimental effect on OCA-B / Oct-1 -dependent transcription .
 protein: PC4; protein: Oct-1; protein: OCA-B
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
 Entities: PC4, Oct-1, OCA-B 
Answer:
 protein: PC4; protein: Oct-1; protein: OCA-B