Figure 2From: Co-evolution positions and rules for antigenic variants of human influenza A/H3N2 virusesThe relationship between entropies and information gains of 329 amino acids on HA protein. The positions in area I (e.g. 145-A, 189-B and 278-C) with both high entropy and high IG values are highly correlated to the antigenic variants. 145-A denotes the amino acid position 145 located at the epitope A.Back to article page