Q32F54 19 ISSEKKLTIHIVQMFHLLSQVFYNLKMFLMMDMLGVGDAININTNKNIRQVC 70 Shigella dysenteriae Sd197 P76118 19 ISSEKKLTIHIVQMFQLLSQAFYNLKMFLMMDMLGVGDAININTNKNIRQVC 70 Escherichia coli K-12