FIG. 2. The Octopus ER is an ortholog of the vertebrate ERs. A reduced
version is shown of a phylogeny of 78 steroid and closely related
receptors; the same tree was inferred using both Bayesian and maximum
parsimony methods. The number of sequences in each clade is
in parentheses. Node labels show support for each node as Bayesian
posterior probabilities followed by MP bootstrap support, both as
percentages. Branch lengths were inferred by the Bayesian analysis.
GR, Glucocorticoid receptor; MR, mineralocorticoid receptor; AR, androgen
receptor; PR, progesterone receptor; COUP-TF, chicken
ovalbumin upstream promoter-transcription factor; RXR, retinoid X
receptor.