Figure 2.
Figure 2: Structure and interactions in the junctional region of
the lysine riboswitch. a, Stereo view of the junction with
bound lysine. Green sphere depicts a K^+ cation. b, Details of
riboswitch lysine interactions. Lysine is positioned within the
omit F[o] - F[c] electron density map contoured at 3.5 level.
Water molecules are shown as light blue spheres. K^+ cation
coordination and hydrogen bonds are depicted by dashed lines. c,
Direct and water-mediated interactions involving -ammonium
group of lysine. d, e, Interactions in the top (d) and middle
(e) junctional layers.
The above figure is reprinted
by permission from Macmillan Publishers Ltd:
Nature
(2008,
455,
1263-1267)
copyright 2008.
level.
Water molecules are shown as light blue spheres. K^+ cation
coordination and hydrogen bonds are depicted by dashed lines. c,
Direct and water-mediated interactions involving 
-ammonium
group of lysine. d, e, Interactions in the top (d) and middle
(e) junctional layers.