Having confirmed expression of the main vitamin C (SLC23A1 and SLC23A2) and dehydroascorbic acid (DHA; GLUT1) transporters in each T-ALL cell line (SI Appendix, Fig. S3A), we blocked transport through SLC23A1, SLC23A2, and GLUTs with the inhibitor phloretin (39, 40). This evidence concerns the gene SLC23A2 and acute lymphoblastic leukemia.