Data density in clusters of the selected clustering.

<p>Mean data density of sequences in clusters in the selected clustering of the NSI/SI (A) and R5/X4 dataset (B) is plotted against the cluster size. Single unclustered sequences are represented by dots at the value 1 on the x-axis with colors corresponding to their phenotype: NSI/CCR5 sequences in blue, SI/CXCR4 in red, R5X4 in magenta. Clusters are represented by black dots, cluster sizes are displayed in log scale. Large clusters are formed in denser parts of the data space than unclustered sequences. SI/CXCR4 sequences remain predominantly unclustered.