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Genetic organization of the RL1 and RL2 genes. The polycistronic RL1/RL2 mRNA is shown at top with introns as black boxes and exons as lines between introns. The locations of consensus poly-adenylation signals in the genome are indicated in white. The reading frame of introns is indicated by hatched boxes below the mRNA map, the three gray bars representing reading frames 1, 2 & 3 in the DNA sequence.
