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33 Non-specific cysteine transporters While influx transporters are the main means by which cells acquire cystine, cysteine can also be taken up from the extracellular milieu into cells directly by excitatory amino acid transporter 3 (EAAT3) and the alanine-serine cysteine transporters 1 and 2 (ASCT1/2), all of which are known to be overexpressed in different cancer types 34 (Table 1)

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Protein Denaturation ROS oxidize amino acids, disrupt folding, and impair enzyme function