meRfi®-GM
The Digital Textbook on Gut Microbiota and Beyond

There are three isoforms of NOS, two of which - endothelial (eNOS) (Garthwaite et al. 1988 Nature 336: 385-388; Raman et al. 1998 Cell 95: 939-950) and neuronal (nNOS) (O’Dell et al. 1994 Science 265: 542-546; Iwai et al. 1995 Hypertension 25: 431-436; Bec et al. 1998 J. Biol. Chem. 273: 13502-13508) - are constitutively expressed, while the third one, inducible NOS (iNOS) (Geller et al. 1993 Proc. Natl. Acad. Sci. USA 90: 3491-3495; Geller et al. 1993a Proc. Natl. Acad. Sci. USA 90: 522-526; Hokari et al. 1994 J. Biochem. 116: 575-581), is expressed in response to [cytokines](brain://ASLYfJd_V06VMI5duzVk_g/Cyt…