Fig. 6From: Untargeted metabolomics analysis reveals Mycobacterium tuberculosis strain H37Rv specifically induces tryptophan metabolism in human macrophagesDetermination of expression of genes involved in trp metabolism. mRNA level of target genes was detected by qPCR. Vertical bars represent the means ± S.D. (n = 3). * p<0.05, ** p<0.01Back to article page