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Figure 2.
Figure 2. Stereo views of K63- and K48-linked ubiquitin chains.
Upper panel: The extended K63-linked ubiquitin chain that runs
through the di- and tri-ubiquitin crystals. Shown are surface
representations for six monomers (three adjacent asymmetric
units). Molecules occupying the distal position are colored blue
and molecules in the proximal position are colored yellow. The
proximal end of the chain is at the bottom of the figure, and
the distal end at the top. On each molecule, the hydrophobic
patch comprising residues Leu-8, Ile-44, and Val-70 is colored
red. Lower panel: A tetramer of K48-linked ubiquitin molecules.
Starting from the distal end and moving toward the proximal end
of the chain, the monomers are colored cyan, magenta, blue, and
yellow, respectively. The hydrophobic patch on each monomer is
colored red, as in the upper panel.
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