PROM1 and acute myeloid leukemia: Two different AML cell lines have previously been shown to express TNTs; THP-1 cells, not quantified per 100 cells, but demonstrated used for transfer of calcium flux and dyes [32] and KG1a cells found to have 13.97 ± 3.31 TNTs per 100 cells and shown to transport the stem cell marker CD133 [33].