Comparative genomic environment of gphβ subunit genes in representative vertebrates. Human (Hs), chicken (Gg) and zebrafish (Dr) gphβ (lhβ, fshβ and tshβ) environment ([GPHβ]) are shown with their coordinates in megabase pairs from the p end of the relevant chromosome (chr.). [LHβ] is not found in chicken genomic databases but the existence of at least lhβ and lin7b is known from their cDNA product. A fish-specific genomic duplication (FSGD) generated specific duplicates in zebrafish. A paralogous environment devoid of any gphβ subunit gene is named [GPHβ-Ghost].
Dos Santos et al. BMC Evolutionary Biology 2011 11:332 doi:10.1186/1471-2148-11-332