Table 3.

Fit parameters measured from independent HeLa cells at different excitation powers

Excitation Power	D (μm2 s−1)	K (s−1)	ρon	fD
Full (∼24 mW)	10.9	23.6	0.490	0.252
	8.89	21.4	0.451	0.376
	12.8	22.8	0.416	0.322
Medium (∼1⩽ mW)	12.8	18.5	0.545	0.230
	10.9	16.6	0.495	0.323
	7.39	17.2	0.501	0.290
Low (∼14 mW)	5.31	10.9	—	—

Different rows are ROI analyses of independent cells. Fits for ρ_on and f_D at low power were omitted because of inconsistent fitted values when using different τ and |k|² fitting ranges.