Clustering of co-expressed genes in
. Figure reproduced from . A k-means clustering analysis (k = 12) was performed as previously described . Values in lower-left indicate the number of genes in each cluster. White plot lines represent log2-transformed and median-centered expression of individual genes and red plot lines show median values for the cluster. Background shading indicates general categories of tissue/cell type. SPN = spinal cord; BRN = brain; KID = kidney; HRT = heart; SKM = skeletal muscle; HEO = Hunter’s EO; SEO = Sachs’ EO; MEO = main EO.