Through a lot of boring sciencey steps, our body produces something
called nitric oxide synthase (NOS) which may cause blood vessels to expand, reducing blood pressure.
The study, which appears online October 29 in the journal Science Signaling, describes a previously uncharacterized interaction between GRK2 and an enzyme
called endothelial
nitric oxide synthase (eNOS), in which the two enzymes attempt to block one another's activity, with different outcomes on heart function.