Figure 5From: Efficiency clustering for low-density microarrays and its application to QPCRPlot of individually determined primer efficiency values. For the 78 primer pairs considered individual efficiency estimates range from 1.72 to 2.2, and these primer pairs are grouped into 7 clusters. These clusters are color coded. Shown below is a table of the numbers of primers in each cluster and the average efficiency. Within-cluster differences in efficiency are insignificant, and the average efficiency for each cluster is used.Back to article page