Fig. 1.

TTAA sites mutated in Ac-FPm. Circles represent the 13 TTAA sites in the WT AcMNPV fp25k gene that were changed in Ac-FPm. The names of known mutants involving transposon insertion into TTAA sites are indicated. Closed triangles denote the TTAA sites of known insertions of host DNA/transposons into AcMNPV or GmMNPV mutants (Bischoff & Slavicek, 1997). The sites of multiple TTAA sequences in close proximity are indicated by a dashed arrow, with the number in parentheses denoting the number of TTAA repeats. Sites at which the mutation led to reversion of TTAA during passaging are denoted by solid arrows, with the numbers above the arrows denoting the number of mutations (reversions)/total number of isolates investigated.