Schematic diagram of neurohypophysial hormone gene locus in vertebrates. Arrows represent genes and indicate the orientation of transcription. Genes flanking the Tetraodon Gnrh2 and Ptpra genes and the genes present downstream of fugu CL1 gene are not shown for the sake of clarity. Fugu orthologs for Gnrh2 and Ptpra genes are yet to be sequenced (likely to be present in the gaps of the genome assembly). GFRA4, glial cell line-derived neurotrophic factor family receptor alpha 4 protein gene; ATRN, attractin gene; SLC4A11, solute carrier family 4, sodium bicarbonate transporter-like, member 11; ITPA, Inosine triphosphate protein gene; ProSAPiP1, ProSAP-interacting protein 1 gene; Ubox5, U-box domain containing 5; [Lys8]VP, lysipressin gene; VT, vasotocin gene; MT, mesotocin gene; OT, oxytocin gene; IT, isotocin gene, Gnrh2, gonadotropin-releasing hormone 2; PTPRA, protein tyrosine phosphatase receptor type A gene; FABP1, fatty acid binding protein 1 gene; smyd1, SET and MYND domain containing 1 gene; SPR, sepiapterin reductase protein gene; CCL1 chemokine CL1 gene.