Plots of key data-processing statistics for merged datasets from the four treatment groups: untreated (cyan), SEM loaded (green), SEM unexposed (blue) and SEM exposed (red). Plots of (a) maximum resolution, (b) Rp.i.m. and (c) CC1/2 show each dataset as a coloured circle and the black line indicates the mean value. For the SEM-unexposed and SEM-exposed samples, the numbers next to the circles indicate which of the three grids the data were collected from. The data from grids 1 and 2 were collected on I24, and the data from grid 3 were collected on I04.