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Figure 1.
Figure 1. Structure of the RecA monomer from the form 2
crystal. The orientation is the same as for the uppermost
monomer (magenta) from the form 2 filament shown in Figure 2c.
The a-helices and b-strands of RecA are labeled according to
form 1.12 The three calcium ions on the surface are shown as
magenta spheres. Residues 66-71 of the P-loop of the ATP-binding
site are colored green. Residues 329-331 of the C-terminal tail,
which are ordered only in form 2, are shown in blue bonds. The
last ordered residues at the ends of loops L1 and L2 are
highlighted in orange and red, respectively.
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