Heat maps showed differential gene expression in CD38 KO mice.

<p>(A) Heat maps of gene expression in sedentary samples from gastrocnemius comparing WT (red) and CD38 KO mice (green). Yellow denotes up-, and blue down-regulation. Genes and samples are represented by <i>rows</i> and <i>columns</i>, respectively. Genes with FDR < 0.1 and absolute fold-change > 1.5 are shown in the heat maps and are clustered by hierarchical clustering (dendrograms not shown). (B) Heat maps of gene expression comparing sedentary (red) vs. treadmill (green) in gastrocnemius of WT samples (right).