In response to Y. Pouliot's inquiry: as far as I can see, there are
three hemagglutinin structures from influenza virus:
1) mutant Gly116 --> Asp in chain ha1
2) mutant Leu226 --> Gln in chain ha1
3) mutant Asp112 --> Gly in chain ha2
Hope it helps ....
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J-L. Risler Bionet at frcgm51.bitnet
Centre de Genetique Moleculaire Risler at frcgm51.bitnet
91190 Gif sur Yvette France