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Its expression appears to be activated during pro-B-cell development , is abundant at the pre-B- and mature B- cell stages , but is absent in terminally differentiated plasma cells .
 cell type: terminally 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:
 cell type: terminally differentiated plasma cells