Fig. 3From: Systemic perturbations in amino acids/amino acid derivatives and tryptophan pathway metabolites associated with murine influenza A virus infectionHeat map showing 18 metabolites of the tryptophan pathway during IAV infection. Each colored cell represents metabolite changes between the control and infection groups. The heat map was assembled by cluster analysis, and therefore, similar levels of metabolite changes are positioned at a short distance from each other, whereas different levels of metabolite changes are positioned at a long distance from each other. n = 5Back to article page