The Pacific electric ray and its relatives are used as model organisms for biomedical research .
Relatives ' electric organs contain an abundance of important nervous system proteins such as nicotinic acetylcholine receptor and acetylcholinesterase .
The Pacific electric ray and its relatives are used as model organisms for biomedical research , because their electric organs contain an abundance of important nervous system proteins such as nicotinic acetylcholine receptor and acetylcholinesterase .