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Effect of T4C, MT4C, and l-cysteine on the growth of trophozoites cultured under l-cysteine-depleted conditions. Trophozoites (104 cells/ml) were cultivated in l-cysteine-deprived BI-S-33 media with and without 2 mM T4C, MT4C, or l-cysteine or 1 mM each T4C and MT4C. The parasites were counted every 24 h on a hemocytometer. Error bars represent the standard errors of results from five independent experiments. Cys dep, absence of l-cysteine, T4C, and MT4C.
