Indeed, and patents are even being granted on gene sequences, as well has knowing what the sequence means, how to detect it, and how to alter it.
I can at least understand the arguments for the latter three: you did the work figuring out what a particular sequence does, figured out how to detect it, and figured out how to change it, so having some protected time to make money off of your work is at least fathomable.
But the sequence itself? Insane. Other scientists can't even research other ways to find it, etc. It's akin to the first guy who saw a horse getting protection that prevents other people from even talking about horses, much less doing anything with other horses they see.