the bovine leukemia virus mrnas expressed in cultured bovine cells of various origins are a 9.0-kilobase genomic rna , a 5.1-kilobase env rna , and a newly detected 2.1-kilobase rna corresponding to the transcription of px sequences located in between the env gene and the 3 ' end of the provirus .
C0035668
rna
C0040649
transcription