nonhuman 82 priority journal 74 article 72 controlled study 72 nitric oxide synthase 70 Animals 60 animal experiment 56 animal tissue 54 nitric oxide 54 enzyme activity 48 Nitric Oxide Synthase 42 animal model 40 mouse 38 protein expression 38 female 36 Female 34 male 32 Mice 30 signal transduction 30 Nitric Oxide 28 animal cell 28 rat 28 Male 26 Nitric oxide synthase 22 Nitric oxide 20 unclassified drug 20 NITRIC OXIDE SYNTHASE 18 Signal Transduction 18 enzyme activation 18 inducible nitric oxide synthase 18