Figure 3
Scanning electron micrographs of Phe (a) 300 μM L-Phe (b) 6 mM L-Phe (c) 300 mM L-Phe (top window 10 k × zoom) (d) D-Phe (e) DL-Phe (top window 5 k × zoom) (f) L-Phe in PBS (g) L-Phe in 0.1 N HCl (h) L-Phe in 0.1 N NaOH.
Scale bars shown in white for (a), (b), (d), (f–h) are 2 μm; 10 μm for c and 20 μm for e.
