ML tree of mammalian Hsp60 (Cpn60) sequences, including genes (black font) and pseudogenes from human (red font), mouse (blue font), and rat (green font). The scale bar represents the indicated number of substitutions per position for a unit branch length. The species tested are not all included in this representation of the tree to avoid overcrowding. In the following list of abbreviations of the names of the species tested, those shown in the figure are in bold face: Bt, Bos taurus (cow); Cf, Canis lupus familiaris (dog); Dn, Dasypus novemcinctus (nine-banded armadillo); Dr, Danio rerio (zebrafish); Ec, Equus caballus (horse); Ga, Gasterosteus aculeatus (stickleback, fish); Gg, Gallus gallus domesticus (chicken); Hs, Homo
sapiens (human); La, Loxodonta africana (african bush elephant); Md, Monodelphis
domestica (south american gray short-tailed opossum, marsupial); Mm, Mus musculus (mouse); Mmu, Macaca mulatta (rhesus monkey); Mmur, Microcebus murinus (gray mouse lemur); Oa, Ornithorhynchus anatinus (platypus); Ol, Oryzias latipes (the medaka or japanese killifish); Pp, Pongo pygmaeus (northwest bornean orangutan); Ptr, Pan troglodytes (chimpanzee); Rn, Rattus norvegicus (rat); Tn, Tetraodon nigroviridis (spotted green pufferfish); Tr, Takifugu rubripes (japanese pufferfish); Xl, Xenopus laevis (african clawed frog, amphibian); Xt, Xenopus tropicalis (western clawed frog, amphibian). The violet arrow at the bottom indicates the human HSPD1.