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. 2012 Mar 28;7(3):e32543. doi: 10.1371/journal.pone.0032543

Figure 2. Heatmap displaying the relative abundance of OTUs per sample.

Figure 2

Samples are grouped by hierarchical cluster analysis on the x-axis and by neighbour-joining phylogenetic tree with nearest neighbour interchange on the y-axis. Samples amplified with ‘bifidobacteria-optimised’ primers are in red and with the standard primers in blue. Bifidobacterial OTUs are highlighted in the red box.