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. 1999 May;67(5):2233–2240. doi: 10.1128/iai.67.5.2233-2240.1999

FIG. 2.

FIG. 2

Effect of the absence of l-tryptophan (L-Trp) in 2C4 cells stimulated with rIFN-γ (900 IU/ml) and/or rTNF-α (60 IU/ml) and infected with (A) T. gondii or (B) T. cruzi. The cells and parasites were maintained without l-tryptophan as described in Materials and Methods. The replication was evaluated 24 h postinfection. An asterisk indicates a result statistically different from the control group (P < 0.05). Results indicate the means ± the standard errors of the means from three independent experiments done in duplicate.