(d,e) FCS analysis of diffusion (d) and brightness (e) of the GFP1-5 ruler and of STG-p62 in the cytoplasm of Hap1 cells. Dashed lines represent the linear regression of the GFP1-5 ruler data. Regression coefficients are indicated. For all data points averages and SDs (on both axes for STG-p62) are shown (see methods for a list of the number of measurements performed for each construct). MW: molecular weight. D: diffusion coefficient (µm2/s) 