Figure 3From: Age and sex differences in kidney microRNA expression during the life span of F344 rats Differentially expressed miRNAs (174 miRNAs) were clustered in 10Â k-means clusters. Ten clusters were chosen as an estimate of the number of large-scale expression patterns within the life span. As most miRNA expression changes are very subtle, miRNAs generally clustered according to normalized expression level.Back to article page