|
Figure 4.
Figure 4: The eight classes of steric zippers. Two identical
sheets can be classified by: the orientation of their faces
(either 'face-to-face' or 'face-to-back'), the orientation of
their strands (with both sheets having the same edge of the
strand 'up', or one 'up' and the other 'down'), and whether the
strands within the sheets are parallel or antiparallel. Both
side views (left) and top views (right) show which of the six
residues of the segment point into the zipper and which point
outward. Green arrows show two-fold screw axes, and yellow
arrows show translational symmetry. Below each class are listed
protein segments that belong to that class.
|
