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Figure 6
The first 32 eigenimages of 20 000 picked particles. The first eigenimage is rotationally symmetric, reflecting this property of the first set of particle-picking templates. Eigenimages 2 and 3 reflect the predominant sixfold symmetry of the worm-haemoglobin `top views'.

IUCrJ
Volume 4| Part 5| September 2017| Pages 678-694
ISSN: 2052-2525