Fly brain neurons (IMAGE) Howard Hughes Medical Institute Caption Neurons from the fly brain of a GAL4 line, VT032228-GAL4, labeled in different colors with the fly brain outlined in gray. Individually labeling these neurons allows scientists to clearly see their shape. If the same neuron is labeled by two different GAL4 lines, these lines can be combined so the neuron can be specifically labeled and manipulated. Credit Credit: Geoffrey Meissner/FlyLight Usage Restrictions Please use caption and credit information provided. License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.