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Figure 6.
Figure 6. Space-filling representation for the progressive
hydration of the Gly→Ala peptide as seen in the crystal
structure. The views in the top row are perpendicular to the
molecular axis, whereas those in the bottom row are parallel to
the molecular axis at the same hydration level. (a) A view of
the naked triple helix; the three peptide chains are shown in
different colors. (b) Incorporation of the first shell of water
molecules, directly hydrogen bonded to carbonyl, hydroxyl or
even amide groups on the peptide surface. (c) Incorporation of
the second shell of water molecules, hydrogen bonded to the ones
in the first shell; the filling of the superhelical groove by
solvent molecules becomes more evident. (d) Third shell of water
molecules. Figure 6. Space-filling representation for the
progressive hydration of the Gly→Ala peptide as seen in the
crystal structure. The views in the top row are perpendicular to
the molecular axis, whereas those in the bottom row are parallel
to the molecular axis at the same hydration level. (a) A view of
the naked triple helix; the three peptide chains are shown in
different colors. (b) Incorporation of the first shell of water
molecules, directly hydrogen bonded to carbonyl, hydroxyl or
even amide groups on the peptide surface. (c) Incorporation of
the second shell of water molecules, hydrogen bonded to the ones
in the first shell; the filling of the superhelical groove by
solvent molecules becomes more evident. (d) Third shell of water
molecules.
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