Bayesian phylogenetic analysis of two RNAi genes. (A) Argonaut genes, and (B) Dicer genes. Based on functional studies in Drosophila, AGO1 and DCR1 gene copies are thought to play a housekeeping function, whilst AGO2 and DCR2 gene copies are thought to be involved in antiviral pathways. Numbers at nodes are Bayesian posterior probabilities.
McTaggart et al. BMC Genomics 2009 10:175 doi:10.1186/1471-2164-10-175