Figure 3
From: Decreased tryptophan metabolism in patients with autism spectrum disorders
Histogram of gene expression of selected genes in tryptophan metabolic pathway in the ASD cells vs . control cells. The bar height of the histogram indicates the mean of measurements of 10 cell lines for the controls and 10 cell lines of patients with ASDs. Vertical bars are standard errors of the means. Symbol denotes level of statistical significance determined by a t test: *P <0.05; **P <0.01. ns, non-significant.