Consensus phylogenetic tree of NLRPs reconstructed by the fusion of four separate methods (NJ, ME, MP and ML). A total of 83 NLRP protein sequences from 6 mammalian species (cattle, dog, human, chimpanzee, mouse and rat) are used with chicken as outgroup. A total of 122 amino acid sites are included in the analyses. The bootstrap values are labeled on the main branches for the four different methods (followed the order of NJ, ME, MP and ML methods). The symbol * means that the branch is not supported by the corresponding method.