Toll-Like Receptor 4 (IMAGE) Neural Regeneration Research Caption This image shows localization of Toll-like receptor 4 (TLR4) in primary cultured hippocampal neurons by fluorescence microscopy. Cultured cells were stained with neuron-specific nuclear protein (neuronal nuclei; NeuN) to label neurons (red) or TLR4 (green). Almost all the cultured cells are NeuN/ TLR4-double positive. TLR4 was mostly expressed on the cell surface with limited staining in the cytoplasm. Credit <i>Neural Regeneration Research</i> Usage Restrictions None License Licensed 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.