Table 1.

Potential compensatory mutations within the 5′ UTR and Nsp1 coding region of progeny from the B^142-173/M chimera

^aPlaque purified clones were selected at virus passage 0 (VP0) and identified as small (S) or large (L).

^bNumber of base pairs within the base-pairing window (identified as positions 145 to 169 in the 5′ UTR and 347 to 363 in the Nsp1 cistron).

^cSee Fig. 3 for descriptions of the folding patterns.

^dCauses K52E.

^eCauses P47T.

^fCauses K48N.

^gCauses M128V.

^hCauses K50T.

ⁱCauses F11L.