Figure 4.
DNA sequence alignments for complementary DNA strands for four loci bearing mononucleotide repeat polymorphisms among strains of E. coli. PCR products were sequenced using the dideoxy-chain termination method and aligned using the Pile-up GCG program. Polymorphic SSR tracts are shown in boldface letters. (A) Poly(G) tract 77 bp and poly(T) tract 84–89 bp upstream of the ATG element of ycgW; (B) poly(C) tract ∼90 bp and poly(T) tract 76 bp upstream of the ATG element of yaiN; (C) poly(A) tract 35 bp and poly(T) tract 67 bp downstream of the tRNA gene serW; (D) poly(T) tract 38 bp upstream of the ATG element of caiF.
