Research Article

Proteinquakes in the Evolution of Influenza Virus Hemagglutinin (A/H1N1) under Opposing Migration and Vaccination Pressures

Figure 4

The HA1 chain profiles () of Genbank Brisbane ACB11812 (B) and Solomon Islands ACA33672 (A) [Hawaii 2007]. The key B-A mutations are K64I, MT (205, 206) KA, and N238D. The left-right difference crossover near 180 can be described as a hydropathic twist.