FIG. 1.

Schematic representation of Semliki Forest virus constructs described in this article. Solid rectangles indicate hydrophobic sequences (signal sequence/transmembrane domain), and open circles stand for potential N-glycosylation sites. Scissor symbols indicate possible (signal peptidase) cleavages in the precursor. Amino acid sequences around the putative signal sequence junction sites are indicated, where an asterisk indicates a cleavage site predicted by the von Heijne (41) algorithm, and a circumflex (∧) indicates a cleavage site predicted by the Jagla algorithm (unpublished data).