SLC38A1 and melanoma: To emphasize the importance of glutamine transporters in melanoma, we investigated the gene expression of glutamine transporters SLC38A1/SNAT1, SLC38A2/SNAT2, SLC1A5/ASCT2, and SLC7A5/LAT1, which showed expression in RNA sequencing analysis in several melanoma cell lines (Supplementary Figure S2A).