PMEL and melanoma: Functional reactivities of gp100 and MART-1 specific CTL clones in the presence of melanocyte lines HEMn-4C0197, 3C0661, 3C0659, and 3C0764 were compared with that in presence of melanoma lines A375, mel526, and Malme-3M using the CD107 degranulation assay.