Fig. 5

Molecular phylogenetic reconstruction of the CRiSP toxins showing the lineage-specific amplification of particular form. RFS = rear-fanged snake. While both the RFS and elapid-type contain other lineages, they are in extremely limited amounts and thus the nomenclature used reflects the dominant lineage expressing a particular form. See Table 1 for values. Additional Files contain sequence alignment used for constructing phylogenetic tree (Additional File 8), tree output file (Additional File 9), and zoomable high-resolution tree image (Additional File 10)