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The factor responsible for this activity was designated Oct coactivator from B cells ( OCA-B ).
 protein: OCA-B; protein: Oct coactivator; cell type: B cells
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 protein: OCA-B; protein: Oct coactivator; cell type: B cells