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In contrast, levels of the transcriptional factor AP-1 , which is not known to be important in B cell Ig production , were reduced by TGF-beta .
 cell type: B cell; protein: transcriptional factor AP-1; protein: TGF-beta; protein: Ig
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:
 cell type: B cell; protein: transcriptional factor AP-1; protein: TGF-beta; protein: Ig