The cytoplasmic tail of the spike protein of the severe acute respiratory syndrome coronavirus contains a novel endoplasmic reticulum retrieval signal that binds COPI and promotes interaction with membrane protein.

McBride, C.E., J. Li, and C.E. Machamer. 2007. The cytoplasmic tail of the spike protein of the severe acute respiratory syndrome coronavirus contains a novel endoplasmic reticulum retrieval signal that binds COPI and promotes interaction with membrane protein. J. Virol., 81:2418-2428.