Fig 2. Sequence context around translation start sites.

Two example sequence contexts are shown to visualize the definition of the flanking sequence around translation start sites. Per definition, positions around the translation start site are given relative to the start codon, which is denoted as 1,2 and 3. Position zero is left out. Positions -3R (R = purine) and +4G were shown to be crucial for translation initiation [16, 17] and are therefore highlighted in red color.