Table 1.
Influenza HA amino acid Sequence comparison* (HA1 domain aa 43–315)
Sequences were obtained from the NCBI protein sequence database (PR8: A/PR/8/34, ABD77675; WSN: A/WSN/1933, ABF47955; Aichi: A/Aichi/2/1968, AAA43239; Phil: A/Philippines/2/1982, AAA18781, HK: A/Hong Kong/1968, ABQ97200). Within the same subtype, sequences are aligned (PR8 and WSN, Aichi and Phil). Dots indicate the identical amino acid within the comparing pair (PR8 versus WSN; Aichi versus Phil). Different amino acid residues are indicated.
