Table 1. Particle numbers at each stage in image processing.

	eVLP	CPMV-B
Autopicking	62,514	72,061
Particle sorting	52,970	65,346
2D classification	39,800	48,189
3D classification	4,998	4,331

eVLP, empty virus-like particle; CPMV-B, cowpea mosaic virus B; 2D, two-dimensional; 3D, three-dimensional.