Fig. 4From: An integrative metabolomics and transcriptomics study to identify metabolic alterations in aged skin of humans in vivo Change of tRNA synthetases and amino acid levels during aging. Q-values are FDR-corrected p-values of a t-test comparing metabolite intensities of old and young skin samples. Stars (*) mark genes with significant changes in gene expression comparing skin from old and young donors (|log2(old/young)| > 0.25, adj.p < 0.01)Back to article page