1536
In lymphoid cells , higher activation levels were observed, suggesting that distinct B-cell-specific cofactors in concert with the effector domains of Oct-2a might be involved in mediating transcription from proximal and remote positions .
 protein: Oct-2a; protein: effector domains; protein: B-cell-specific cofactors; cell type: lymphoid 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: Oct-2a; protein: effector domains; protein: B-cell-specific cofactors; cell type: lymphoid cells