October 2017 | Volume 214, No. 10
Cover image

ON THE COVER
Mossadegh-Keller et al. show the distinct origin of two different testicular macrophage populations during postnatal development. The cover illustrates a newborn mouse testis with CX3CR1 macrophages (green) surrounding phalloidin-stained seminiferous tubules (red) and nuclei labeled with Sytox blue (cyan). The image was provided by the authors.
See page 2829