A novel sorting signal for intracellular localization is present in the S protein of a porcine coronavirus but absent from severe acute respiratory syndrome-associated coronavirus - Christel Schwegmann-Wessels; Marwan Al-Falah; David Escors; Zai Wang; Gert Zimmer; Hongkui Deng; Luis Enjuanes; Hassan Y. Naim; Georg Herrler (Journal of Biological Chemistry, 2004)