Comment on

• Protein S-guanylation by the biological signal 8-nitroguanosine 3',5'-cyclic monophosphate.

  Sawa T, Zaki MH, Okamoto T, Akuta T, Tokutomi Y, Kim-Mitsuyama S, Ihara H, Kobayashi A, Yamamoto M, Fujii S, Arimoto H, Akaike T. Sawa T, et al. Nat Chem Biol. 2007 Nov;3(11):727-35. doi: 10.1038/nchembio.2007.33. Epub 2007 Sep 30. Nat Chem Biol. 2007. PMID: 17906641