WB using anti-Notch 2 (intra) antibody shows detection of a band at ~110 kDa corresponding to active Notch 2 protein (arrowhead). WB analysis was performed for Notch 2 expression using human mesothelial SV40 cells lysate obtained fromtransfected with a plasmid encoding a constitutively active Notch 2 (intra cellular Notch 2). Lanes 1-3 contain lysate 24 h (1), 48 h (2), and 72 h (3) post transfection. Lanes 4-6 are the corresponding control cells (untransfected). Anti-Notch 2 was used at 1:400.