cells
INTRODUCTION: Nitric oxide (NO) is produced by the action of NO synthase (NOS)       using L-arginine as a substrate in various cells and found in air exhaled by       humans.
INTRODUCTION: Nitric oxide (NO) is produced by the action of NO synthase (NOS)       using  @OBJECT$  as a substrate  @PREDICAT$  various  @SUBJECT$  and found in air exhaled by       humans.