Histogram of TPPII particle number in each tomogram. Template matchings of 70 tomograms provide 93 particles of TPPII. In the dataset, 28 tomograms (40%) contain no TPPII particle (green), 13 tomograms (18.6%) contain one particle, 15 tomograms (21.4%) contain two particles, 7 tomograms (10%) contain three particles, 6 tomograms (8.6%) contain four particles, and 1 tomogram (1.4%) contains five particles.