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. 2014 Jan 27;111(6):2134–2139. doi: 10.1073/pnas.1320624111

Table 2.

EMfit statistics for fitting of Fab fragments into cryo-EM electron density maps.

Fab Sumf Clash −Den
E18 54.9 0.0 5.0
E19 38.6 0.0 17.0

Clash, percentage of atoms in the model that have clashes with symmetry related protein molecules; −Den, percentage of atoms positioned in negative density; Sumf, average value of density at atomic positions normalized by setting the highest density in the map to 100.