to identify the region of the ribosomal protein mrnas responsible for their typical translational behavior , we constructed a fused gene in which the upstream sequences ( promoter ) and the 5 ' untranslated sequence ( first exon ) of the gene coding for xenopus ribosomal protein s19 were joined to the coding portion of the procaryotic chloramphenicol acetyltransferase ( cat ) gene deleted of its own 5 ' untranslated region .
C1519614
translational
C1335641
gene