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. Author manuscript; available in PMC: 2009 Jan 1.
Published in final edited form as: J Struct Biol. 2007 Oct 11;161(1):83–91. doi: 10.1016/j.jsb.2007.09.023

Fig. 6.

Fig. 6

Side- and top-view of surface representation of the cryo-EM reconstructed 3D structure of 20S proteasome with (a) 0- and (b) 10-degree tilt off the cylindrical axis, and their corresponding top-view images projected from the 3D density map, showing (c) a distinctive 7-fold and (d) an ambiguous 6-fold symmetry, respectively.