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Table 1 Comparison of amino acid sequences of different H7N7/03 viruses

From: Rapid emergence of a virulent PB2 E627K variant during adaptation of highly pathogenic avian influenza H7N7 virus to mice

  Amino acid identity at indicated positiona
Virus PB2 PA HA NA NS
  79 297 355 563 627 666 13 143 416 164 308 346 442 458 126 137
A/ch/1/03 S V R Q E F I A K T N A T P K V
chH7N7 . . . . . . . . . N . . . . . .
maH7N7 . . . . K . . . . N . . . . . .
A/33/03b . . . . . . . . . . . . . . R .
A/219/03c I I K R K L S T R . S V A S . I
  1. aAmino acids are indicated by single letters; dots represent amino acids identical to the A/ch/Netherlands/1/03 (A/ch/1/03) prototype [11].
  2. bInfluenza A/Netherlands/33/03, isolated from human conjunctivitis case [11].
  3. cInfluenza A/Netherlands/219/03, isolated from fatal human case [11].