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Figure 2 | BMC Genomics

Figure 2

From: Comparative genome analysis of a large Dutch Legionella pneumophila strain collection identifies five markers highly correlated with clinical strains

Figure 2

Genomic diversity based on Principal Component Analysis (PCA). All 346 microarray data sets (linearly distributed values used, based on the selection of 480 markers) were subjected to Principal Component Analysis to determine whether this would lead to subgrouping of patient-derived or environmental strains of L. pneumophila. Each data set is represented as a single dot in an n-dimensional space of which the three main components (covering most of the overall variation covered within these data) are shown. It is clear from this analysis that no clear differences between environmental and patient-derived strains are detected based on overall genome composition.

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