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. 2021 May;6(5):590–598. doi: 10.1016/j.bpsc.2020.12.012

Figure 2.

Figure 2

Robust tryptophan depletion was achieved, verified via plasma samples. More negative values indicate greater depletion of tryptophan. Error bars indicate ±1 SE. ΔTRP:LNAA, change in the ratio between tryptophan and all large neutral amino acids from before to after depletion.