Muscle Innervation

Intact Drosophila larva imaged through the translucent cuticle showing the innervation of the dorsal (towards the back) muscle fibres by motor nerves. The muscles have been genetically engineered to express the green fluorescent protein (GFP) and, therefore, appear green. The nerves express a red fluorescence protein (RFP) and are red. Neuromuscular junctions are shown in yellow.