A ribosomal binding site (RBS) is a sequence on mRNA that is bound by the ribosome when initiating protein translation. It can be either the 5` cap of a messenger RNA in eukaryotes, a region 6-7 nucleotides upstream of the start codon AUG in prokaryotes (called the Shine-Dalgarno sequence), or an internal ribosome entry site (IRES) in viruses. Th....