Fig. 2

Tyrosinase gold labeling on melanocytes; Immunogold labeling electron microscopy showing the 10 nm diameter gold particles conjugated to tyrosinase molecules on melanocytes both in the cytoplasm (arrow in a, b and d, e) and melanosomes (c and f-1, low magnification, -2, higher magnification). The quantity of tyrosinase between sericin-treated (a–c) and non-treated (PEG) (d–f) groups was compared via the numbers of tyrosinase-positive fields in melanocytic cells as shown in bar graph (g)