Long-Sought Protein Packages Glutamate

Glutamate, one of two neurotransmitters that send the basic "stop" and "go" signals that most other neurotransmitters merely modulate, is called into action wherever rapid-fire excitatory signals are needed--say, for vision or learning. For decades, researchers have been looking for the protein that packages glutamate for express delivery to other neurons. On page 957, researchers report that they've found this elusive transporter, dubbed VGLUT1.