Table 3. Sequence identity comparisons of the amino acid sequences of human, zebrafish, frog and fruit fly RET.

	Human RET	Zebrafish RET	Frog RET	Fruit fly RET
Human RET	100%	57.9%	57.6%	25.5%
Zebrafish RET	57.9%	100%	57.9%	25.2%
Frog RET	57.6%	57.9%	100%	23.3%
Fruit fly RET	25.5%	25.2%	23.3%	100%