Table 1.

Summary of molecular probes used in this study.

Molecule	Source	Abbreviation	MW [Da]	rs(Å)	D0 [μm2/s]	Concentratio
						n in PBS [M]
Fluorescein	Sigma-Aldrich	Fluorescein	332	5.02a	425e	10−4
Insulin-FITC labeled human	Sigma-Aldrich	Insulin	5,807	10.5b	150f	4.3 × 10−5
Albumin from Bovine Serum (BSA), Alexa Fluor™ 488 conjugate	Molecular Probes	BSA	66,000	34.8c	63g	3.8 × 10−6
Dextran, Fluorescein, 3000 MW	Molecular Probes	D3K	3,000	14d	155h	1.7 × 10−4
Dextran, Fluorescein, 70000 MW	Molecular Probes	D70K	70,000	60d	30h	1.8 × 10−5
Fluorescein isothiocyanate-dextran 150000 MW	Sigma-Aldrich	D150K	150,000	85d	25h	3.3 × 10−5

^a[41];

^b[42];

^c[43];

^d[44];

^e[45];

^f[46];

^g[47];

^h[48]