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We have analyzed the expression and activity of PU.1 during human B-cell development using a panel of B-cell lines representing different stages of maturation, from early precursors to differentiated plasma cells .
 protein: PU.1; cell line: B-cell lines; cell line: early precursors; cell line: differentiated plasma 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: PU.1; cell line: B-cell lines; cell line: early precursors; cell line: differentiated plasma cells