The article highlighted in this issue is "Inhibition of Gap Junctional Intercellular Communication by Perfluorinated Compounds in Rat Liver and Dolphin Kidney Epithelial Cell Lines in Vitro and Sprague-Dawley Rats in Vivo" by W. Hu, P. D. Jones, B. L. Upham, J. E. Trosko, C. Lau, and J. P. Giesy (pp. 429-436).