Like other sharks, the pyjama shark maintains osmotic balance with the environment by regulating its internal concentration of urea and other nitrogenous wastes.
This enzyme belongs to the family of transferases, specifically those transferring phosphorus-containing groups (phosphotransferases) with a nitrogenous group as acceptor.
Most have no excretory structures, but rely on the diffusion of ammonia across their tissues to rid themselves of nitrogenous waste, though some have a simple excretory system.
