- gp100 mRNA is more sensitive than tyrosinase mRNA for RT-PCR amplification to detect circulating melanoma cells in peripheral blood of melanoma patients. Tsukamoto, K., Ueda, M., Hirata, S., Osada, A., Kitamura, R., Takahashi, T., Ichihashi, M., Shimada, S. J. Dermatol. Sci. (2000)