Result: Averaged affinities predicted by structural modeling indicate that the mutations fall into three groups (Figure 6 (a)): very high-affinity (80 to 90% better that WT;
S477N/
E484K/
N501Y,
S477N/
E484K and
E484K/
N501Y), high-affinity (40 to 50% better than WT;
S477N,
E484K,
N501Y), WT-like (
S477N/
N501Y,
K417T/
E484K/
N501Y,
N439K,
Y453F), and low-affinity (<70% of WT;
K417T<