Primary neuron and Schwann cell culture, isolated from rat dorsal root ganglia in the spine, showing the outgrowth of axons from neuronal cell bodies (labelled for the neuron-specific protein beta III tubulin, green) and the presence of Schwann cells (labelled for the Schwann cell-specific protein S100beta, red) on a polystyrene substrate. – Mehrie Behbehani, University of Sheffield