Figure 6From: Evolution of ribonuclease H genes in prokaryotes to avoid inheritance of redundant genesPossible evolutionary models for the three RNase H genes. Two models that can explain the mutually exclusive evolution of RNase HIII and RNase HI with dsRHbd (Model A) and of RNase HI with and without dsRHbd (Model B). F a and F b indicate the different functions of the RNase H enzymes.Back to article page