Source data for Figure S3D left: Experimental quantitative data on ligand-induced endocytosis (_obs) and standard deviations (stdCol-). Used in conjunction with the core model (Figure 2B and S4B). See 'Materials and Methods - Endocytosis assays' for details. time Epo_extracellular_obs stdCol-Epo_extracellular_obs Epo_cellsurface_obs stdCol-Epo_cellsurface_obs Epo_intracellular_obs stdCol-Epo_intracellular_obs min pM pM pM pM pM pM 0 1987.83 12.58 NaN NaN NaN NaN 5 1726.43 13.02 278.31 12.16 56.80 1.17 20 1479.82 5.28 265.88 4.21 300.23 2.73 60 1391.35 36.11 163.57 15.96 503.89 19.28 120 1312.71 13.75 136.44 10.04 603.32 22.98 180 1392.98 21.15 81.10 7.33 580.30 13.34 240 1501.47 31.20 59.93 9.13 494.45 27.05 300 1594.16 24.70 33.28 2.70 403.09 24.49