TABLE 7.

Mutations found in H9 and the CCHH motif of influenza A virus strains

^aThe region (amino acids [aa] 140 to 162) includes the entire H9 amino acid sequence (aa 140 to 158; underlined) and the overlapping zinc finger motif (aa 148 to 162). The positions of the CCHH motif are shown in boldface type. Single mutations on the amino acid residues that either were lethal or exhibited reduced titers (Table 1, set III) are indicated as bullets (•) or thin arrows (↓), respectively.

^bAAF02331, AAF02339, AAG48222, AAF02337, AAF02335, AAD49079, AAG48220, AAG48221, AAG48223, AAG48224, AAK49237, AAK49239, AAK49241, CAC81331, CAC81332, CAC84226, CAC84268, CAC84269, and CAC84270.

^cAAF74334, AAK49233 (CAC04081, NP_859036), AAK49243, AAK49247, and AAK49251.

^dAAG48225, AAG48226, AAG48227, AAG48228, AAG48229, AAN83989, AAN84013, AAN84020, AAN84032, AAN84034, AAN84044, AAN84047, AAP49150, and AAU11190.