To become a fully mature R2 messenger RNA ( mRNA ) , requires that the initial R2 transcript be processed to remove the 28S rRNA .
The R2 element is co-transcribed with host organism 28S ribosomal RNA ( rRNA ) .
To become a fully mature R2 messenger RNA ( mRNA ) , requires that the initial R2 transcript be processed to remove the rRNA   .
The R2 element is co-transcribed with host organism 28S ribosomal RNA ( rRNA ) .