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. Author manuscript; available in PMC: 2013 Nov 9.
Published in final edited form as: J Struct Biol. 2012 Mar 7;178(2):10.1016/j.jsb.2012.02.014. doi: 10.1016/j.jsb.2012.02.014

Figure 4.

Figure 4

Reference-free subtomogram classification for simulated subtomograms from 4 different protein complexes. (A) Density map of selected protein complexes (I: GroEL (PDBID: 1KP8), II: Carboamoyl phosphate synthase (PDBID: 1BXR), III: octameric enolase (PDBID: 1W6T), IV: ClpP (PDBID: 1YG6 )) and a slice of a simulated subtomogram generated for SNR 0.01 and a tilt angle range ±60. The slice is taken along the y direction. (B) Density maps of complexes generated by averaging all the classified and aligned subtomograms in each class. Also shown is though the averaged tomograms .