Figure 4From: Horizontal gene transfer of zinc and non-zinc forms of bacterial ribosomal protein S4Expansion of Clostridia branches of the consensus S4 phylogenetic tree. The C+ and C-(V) Clostridia branches are highlighted white and yellow, respectively. Sequences from organisms with multiple S4 genes are in bold underline. Sequences from the two genomes with three S4 genes are additionally marked with an (*) asterisk.Back to article page