TABLE 1.

Nucleotide differences between the progenitor wt VSV strain and progeny populations^a

^aThe progeny populations were derived from alternation between persistent infection of LL-5 sand fly cells and acute infection of BHK-21 cells. The history of each strain can be found in Figure 1. The presence of a mutation is indicated by a filled box. Black represents nonsynonymous mutations, dark grey represents synonymous mutations, and light grey represents mutations in noncoding regions. Mut, mutation; AA, amino acid replacement.