Phylogeny relationships of the gonadotropin receptors.

<p>Phylogram of maximum likelihood relationships between LHR and FSHR amino acid sequences of representative gnathostome species. Bootstrap values over 500 replicates (%) are given next to each node in red and SH-like aLRT values (%) are given in black (when different from the boostrap value). Asterisks indicate partial sequences. The actinopterigyan FSHR and LHR clades are highlighted to facilitate the phylogram examination. The sequence of the glycoprotein hormone receptor (GpHR) of an early chordate, the lancelet, was designated to root the tree.