Table 2. Sequence identity comparisons of the amino acid sequences of human, zebrafish, frog GFRα1 and fruit fly GFRL.

	Human GFRα1	Zebrafish GFRα1	Frog GFRα1	Fruit fly GFRL
Human GFRα1	100%	61.5%	68.8%	9.9%
Zebrafish GFRα1	61.5%	100%	59.2%	10.3%
Frog GFRα1	68.8%	59.2%	100%	4.9%
Fruit fly GFRL	9.9%	10.3%	4.9%	100%