Table 2

Sequence conservation of E1 and E2 in H1N1 strains and all subtypes of influenza A viruses circulating in 2007, 2008, and 2009

VirusaSequence conservation rate (%) at the indicated amino acid position (sequence) in the following HA epitope:
E1E2
92 (S)93 (W)94 (S)95 (Y)96 (I)97 (V)98 (E)99 (T)100 (S)101 (S)102 (S)103 (D)104 (N)105 (G)106 (T)107 (C)108 (Y)109 (P)110 (G)111 (D)112 (F)113 (I)114 (D)115 (Y)116 (E)117 (E)Avg124 (S)125 (V)126 (S)127 (S)128 (F)129 (E)130 (R)131 (F)132 (E)133 (I)134 (F)135 (P)136 (K)137 (T)138 (S)139 (S)140 (W)141 (P)142 (N)143 (H)144 (D)145 (S)146 (N)147 (K)148 (G)149 (V)150 (T)151 (A)152 (A)153 (C)154 (P)155 (H)156 (A)157 (G)158 (A)159 (K)Avg
2007_H1N1 (1,000)1001001001001009410067818210010098100100100100210059810010010076981001001009999951001001001001001001939910010098100302510097898810039521007070
2008_H1N1 (408)10010010010099931001311113610010096100100100100710089410099100759699100100100999710010098100100992901001001009610070651009613961310069371009170
2009_H1N1 (1,000)100100100100100100100818080817610010010010010010010081100819810010010095100100100100100100100100100981001001008199100100100100100817881811009981100811008010081100818194
2007_IFA (2,325)33986464658710016291341634425100100100673850279816764566825293155893733335439625105248972533481356210056142572100302385210140
2008_IFA (1,339)4198656567891007321062635136100100100683954377846865577336373957894340405647625415250973839531036310057143668100233110568142
2009_IFA (7,880)861009090909710079877879778987851001001009087887894979089899585858589988685868787898777858899858587797678781008781859410081847988797886
  • a Values in parentheses are the number of HA sequences included in the sequence analysis.