FIG. 1.

σ1s⁻ and σ1s⁺ T3 reoviruses used in this study. Shown are representations of the 120-amino-acid σ1s protein sequence (stippled bars) and the 455-amino-acid σ1 protein sequence (white bars) for each viral strain used. C84-MA does not express σ1s due to an S1 gene mutation (black square). C84-MA, C93, and T3A bind SA (black triangles). C84 does not bind SA due to a mutation in σ1 (open triangle). C93 and T3A contain differences in the σ1 protein sequence compared to C84-MA (dotted boxes). Noted to the right is the σ1s expression status and SA binding ability of each strain.