To assess the localization of MGST1 in melanosomes, mouse B16 (Fig. 3, A and B) and human MNT-1 (Fig. 3, C and D) melanoma cells were immunofluorescently stained by using antibodies against MGST1 and melanosome-specific proteins PMEL and TYRP1. Here, TYRP1 is linked to melanoma.