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Figure 4.
FIG. 4. Samarium binding sites in SP-A. A, stereoview of
the two sites in SP-A, where the bound lanthanide ions are shown
as spheres and labeled 1 and 2 for primary and auxiliary,
respectively. Coordination bonds appear as green dotted lines.
B, comparison of primary (P) and auxiliary (A) sites by backbone
superposition of CRD regions in SP-A (blue), SP-D (magenta), and
MBP (yellow). SP-D and MBP coordinates are from PDB accession
codes 1BO8 [PDB]
and 1KWT [PDB]
, respectively.
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