tokens: To determine if the above effects are specific to MUC1 , we created stable transfectants of the MDA - MB - 468 line using empty vector ( 468 . Neo ) or a full - length MUC1 construct ( 468 . MUC1 Delta 8 ) that is resistant to one of the independent MUC1 - directed oligonucleotides ( ' 882 ' ) .