upon transfection of rat-2-tk- cells with plasmid pes , containing the cloned 7.0-kilobase ( kb ) ecori-sali fragment ( 0.063 to 0.089 map units ) of the human cytomegalovirus genome , major immediate-early antigen expression was obtained in 1 to 2 % of the nuclei of the transfected cells , as determined by immunofluorescence with the e3 monoclonal antibody .
C0007634
cells
C0007610
of