Ancient Origins of Nitric Oxide Signaling in Biological Systems Durner, Jörg ; Gow, Andrew J. ; Stamler, Jonathan S. ; Glazebrook, Jane Abstract Publication: Proceedings of the National Academy of Science Pub Date: December 1999 DOI: 10.1073/pnas.96.25.14206 Bibcode: 1999PNAS...9614206D