1140
However, these genes are not constitutively active in B lymphocytes , suggesting that other regulatory mechanisms must play a role in determining the patterns of expression .
 cell type: B lymphocytes
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 lymphocytes