the vectors consisted of the bovine papilloma virus-1 ( bpv-1 ) genome and t-pa transcriptional unit with a mouse metallothionein ( mt-1 ) promoter at the 5 ' end and mt-1 genomic sequences or sv40 early introns and polyadenylation signals at the 3 ' end .
C0040649
transcriptional
C0949765
polyadenylation