This image shows the distribution of μ-opioid receptors (green) among neurons labeled with NeuN (blue) and neurons expressing tdTomatotagged vesicular glutamate transporter-2 (red) in the mouse spinal dorsal horn. For more information, click the link in our bio to see the article by Chen et al. (pages 9315–9329). 📸 Cover image: Shao-Rui Chen and Hui-Lin Pan.