On the cover: Whole-mount immunofluorescence analysis of the peripheral lymph node shows that autotaxin (blue) is abundantly expressed on the luminal surface of high endothelial venules (PNAd, red), which efficiently mediate extravasation of adoptively transferred GFP⁺ lymphocytes (green). Bai, Z., L. Cai, E. Umemoto, A. Takeda, K. Tohya, Y. Komai, P. T. Veeraveedu, E. Hata, Y. Sugiura, A. Kubo, M. Suematsu, H. Hayasaka, S. Okudaira, J. Aoki, T. Tanaka, H. M. H. G. Albers, H. Ovaa, and M. Miyasaka. 2013. Constitutive lymphocyte transmigration across the basal lamina of high endothelial venules is regulated by the autotaxin/lysophosphatidic acid axis. J. Immunol. 190: 2036–2048.