FIG. 7.
Addition of long AU-rich sequences of 3′ mutants of the SIN genome. (A) Sequences of T3′15(A)n and virus isolates generated from it. Isolates 15A-1, 15A-2, and 15A-3 were derived from experiment 1. Isolate 15A-4 was derived from experiment 2. (B) Sequences of T3′0(A)n and the virus isolates recovered from it. Isolates ZA-1, -2, and -3 were derived from experiment 1, and isolate ZA-4 was derived from experiment 2. The identification of residues and motifs is as described in the legend to Fig. 6.