passages.id: split_7_validation_30_passage
passages.type: progene_text
passages.text: In the present study , we investigated the role of three tandem NF-kappaB sites ( site 1 , - 95 ; site 2 , - 71 ; site 3 , - 53 ) in the regulation of the germline Cgamma1 Ig promoter by CD40 Ligand ( CD40L ) and IL-4 in the mouse B lymphoma cell line , BCL1-3B3 .