Editing Signal transduction (section)

===Redox signaling===
In addition to nitric oxide, other electronically activated species are also signal-transducing agents in a process called [[redox signaling]]. Examples include [[superoxide]], [[hydrogen peroxide]], [[carbon monoxide]], and [[hydrogen sulfide]]. Redox signaling also includes active modulation of electronic flows in [[organic semiconductors|semiconductive]] biological macromolecules.<ref name="Forman_2009">{{Cite journal |vauthors=Forman HJ |date=November 2009 |title=Signal transduction and reactive species |journal=Free Radical Biology & Medicine |volume=47 |issue=9 |pages=1237–8 |doi=10.1016/j.freeradbiomed.2009.09.002 |pmid=19735727}}</ref>