Additional file 4.

Figure S4 -Unrooted phylogenetic tree of nuclear receptor predicted protein sequences. Unrooted phylogenetic trees of the four nuclear receptor types examined model the zebra finch ER receptor subtypes as more similar to each other than AR and PR, which are more closely related to each other. Cross-species positioning within each receptor type show evolutionary changes between birds and mammals. Bootstrap support values are at branch points. Scale bar denotes substitution rate. zf = zebra finch, ch = chicken, h = human, m = mouse, dan = zebrafish, platy = platypus, iso = isoform.

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London and Clayton BMC Neuroscience 2010 11:46   doi:10.1186/1471-2202-11-46