Coexistence of Neuromessenger Molecules -- A Perspective.- : Out of One, Many.- Mechanisms of Synapse Formation: Activity-Dependent Selection of Neurotransmitters and Receptors.- Co-Release of Norepinephrine and Acetylcholine by Mammalian Sympathetic Neurons: Regulation by Target-Derived Signaling.- GABA, Glycine, and Glutamate Co-Release at Developing Inhibitory Synapses.- GABA is the Main Neurotransmitter Released from Mossy Fiber Terminals in the Developing Rat Hippocampus.- Postsynaptic Determinants of Inhibitory Transmission at Mixed GABAergic/Glycinergic Synapses.- Glutamate Co-Release by Monoamine Neurons.- Dopamine and Serotonin Crosstalk Within the Dopaminergic and Serotonergic Systems.- The Dual Glutamatergic/GABAergic Phenotype of Hippocampal Granule Cells.- Synaptic Co-Release of ATP and GABA.- The Co-Release of Glutamate and Acetylcholine in the Vertebrate Nervous System.- Colocalization and Cotransmission of Classical Neurotransmitters: An Invertebrate Perspective.- : Out of Many, One.