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Figure 4.
Fig. 4. Ribbon representation of the GM-linker structure.
In S domain A, Ser-301 forms a hydrogen bond with the 2'-OH
group of C221 in helix 8, and Leu-302, Ala-306, and Met-309 make
hydrophobic interactions with Gly-67 and Leu-68 situated in the
apical loop between  N3 and N4 in
the N domain. The NG domain is shown in blue, the RNA is shown
in red, the M domain is shown in green, and the GM-linker is
shown in orange. The GM-linker in S domain B is shown in gray.
The side chain of Asp-311 in B is also shown. The overlay is
based on the SRP54 M domains.
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