tokens: BrdU incorporation ( Figure 6c ) indicates that 468 . Neo show decreased nucleotide incorporation after MUC1 siRNA compared to control ( 3 . 3 % versus 25 . 0 % , respectively ) ; this is not seen in 468 . MUC1 Delta 8 cells , which show similar levels of BrdU incorporation regardless of the siRNA used ( 21 . 5 % for luciferase , 23 . 9 % for MUC1 ) .