1. An Extended Signal Involved in Eukaryotic −1 Frameshifting Operates through Modification of the E Site tRNA 
Michaël Bekaert, Jean-Pierre Rousset 
Molecular Cell 
Volume 17, Issue 1, Pages (January 2005)
DOI: /j.molcel

2. Figure 1
Unrooted Neighbor-Joining Phylogeny Based on the Amino Acid Sequence of the Pol Protein
Labels at branch tips represent taxa as provided by the Universal Virus Database, ICTVdB ( Büchen-Osmond, 2003). Numbers at branch nodes indicate the percentage of bootstrap support for that node based on 1000 replications. Color codes are according to the clade, with the following scheme: ssRNA-RT viruses (red), positive-sense ssRNA viruses (blue), and dsRNA viruses (green). Abbreviations: PRRSV, Porcine reproductive and respiratory syndrome virus.
Molecular Cell  , 61-68DOI: ( /j.molcel )

3. Figure 2 Estimation of Dinucleotide Usage Bias
χ2 values were calculated at each position upstream of the slippery heptamer. Black line represents the threshold score for a p value of 1% with 15 degrees of freedom. Higher values are more indicative of a significant bias. The first dinucleotide is strongly significant (p value = −11).
Molecular Cell  , 61-68DOI: ( /j.molcel )