RT Journal Article SR Electronic T1 Neurotransmitters, Receptors, and Second Messengers Galore in 40 Years JF The Journal of Neuroscience JO J. Neurosci. FD Society for Neuroscience SP 12717 OP 12721 DO 10.1523/JNEUROSCI.3670-09.2009 VO 29 IS 41 A1 Solomon H. Snyder YR 2009 UL http://www.jneurosci.org/content/29/41/12717.abstract AB The past four decades have witnessed extraordinary advances in the molecular understanding of neurotransmitters, their receptors, and second messengers. This essay highlights a selected group of particular notable discoveries, emphasizing seminal findings that have transformed thinking in the field.