Figure 5.

Expression of tyrosinase in morc mice. (A) Tyrosinase activity in testes extracts from morc +/+, +/−, or −/−, as compared with cultured mouse melanocytes (NM). Histograms represent average of triplicate measurements, and bars indicate SD of the mean. (B) Immunohistochemical staining of tyrosinase in testes of morc mice. Wild-type controls (+/+) show no antibody staining. Intense staining is seen in the germ cell cytoplasm of +/− testes. Faint staining is also present in −/− germ cells. (Magnification: ×400.)