Figure 25
Cross-crystal averaging in haemagglutinin-neuraminidase (HN). (a) The unit cell showing the 6.0 Å MIR map derived from eight heavy-atom derivatives contoured at 2.0σ, revealing two blobs corresponding to the two molecules in the asymmetric unit. (b) A section of the 2.0 Å map after phase extension and cross-crystal averaging over four non-isomorphous data sets. |