human papillomavirus type 16 ( hpv 16 ) open reading frames ( orf ) e6 , e7 , and e6e7 , placed under the control of dexamethasone-inducible mouse mammary tumor virus long terminal repeat , were introduced into rat 3y1 cells , an immortalized fibroblast line , with the aid of neomycin-selection .
C0079941
open reading frames
C0007634
cells