The transgenic construct contains the human KRT14 promoter/enhnacer directing expression of a beta globin intron and a loxP-flanked EGFP/STOP, and the E6 and E7 early genes from Human papilloma virus followed by a KRT14 polyA signal. It is estimated that there are about 18 copies of the transgene per homozyous cell. This allele is founder #14. (J:299115)