Figure 4
UF, SPT and AMo all allow faithful 3D reconstructions of β-galactosidase to be obtained by single-particle analysis. (a) Selected 2D class averages for β-galactosidase obtained from grids prepared by either UF, SPT or AMo negative staining. (b) Surface representation of 3D density maps calculated from these data sets, filtered to 10 Å for comparability. The atomic model of β-galactosidase (PDB entry 6x1q, coloured by individual subunits) was rigid-body fitted to each map. The scale bar is 25 Å. For the complete 3D reconstruction workflow of each condition, see Supplementary Figs. S3, S4 and S5. |