FIG. 1.
Domain at the interface between monomers in the HN dimer. The domain targeted for mutagenesis in this study is shown in space-filling mode in the backbone of the X-ray crystallographic structure of the pH 6.5 form of the HN dimer of the L-Kansas isolate. The domain defined by residues 218 to 226 is shown from both a lateral (A) and membrane (B) view. The residues on different monomers are shown in space-filling mode in either red or yellow. For reference, residue 124 in each dimer, the most N-terminal residue in the soluble form of the protein presumed to be near the top of the stalk, is also shown in space-filling mode in dark blue. The figure was generated with RasMol.