cDNA and deduced amino acid sequence of the GnRH receptor IIa-2 gene in axolotls. Within the cDNA sequences, lowercase letters indicate untranslated regions and uppercase letters indicate the open reading frame; underlining indicates the polyadenylation site. Transmembrane domains were predicted using the HMMTOP 2.0 server  and are indicated above the relevant portion of the sequence. Putative G-protein interaction sites are inferred based on homology with Xenopus laevis and are indicated with a black background. Transparent boxes indicate putative phosphorylation sites (>80% probability) predicted using the NetPhosK server .