Figure 1From: Evolution of selenium utilization traitsDistribution of selenium-utilization traits. The figure depicts the species tree for all organisms completely sequenced so far, based on the phylogenetic reconstruction using the small subunit rRNA sequences and is in good agreement with other consensus phylogenetic trees. Species able to decode Sec are those possessing selA (yellow) (excluding Archaea), selB (blue), selC (green) and selD (red). The presence of ybbB (gray) and selD indicates the ability to synthesize 2-selenouridine.Back to article page