. "Any process that modulates the activity of the enzyme nitric-oxide synthase." . . "regulation of nitric-oxide synthase activity" . "nitric-oxide synthase regulator" . "NOS regulator" . "regulation of NOS activity" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .