Fig 2.

(A) Deduced amino acid alignment and mutations in the second hyper-variable region of G protein of the NA1 genotype. The figure includes alignment of Saudi NA1 strains with the prototype strain from Japan (AB470478). The amino acids sequence alignment corresponds to 227–297 amino acids of the prototype strain. Identical residues are indicated by dashes. Stop codons are indicated by asterisks. Potential N-glycosylation sites (NXT, where X is not proline) are indicated by grey shading. The potential sites for extensive O-glycosylation KPX - - - TTKX motifs are underlined. (B) The amino acid sequence of NA1 genotype showing mutations in the Saudi strains. The sequence corresponds to the 227–297 amino acids of the NA1 prototype strain. Changes at amino acid positions in Saudi strains are shown by arrows.