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Comparative Analysis of Functional Metagenomic Annotation and the Mappability of Short Reads

Figure 6

A principal component analysis of the pathway abundance profiles obtained for the 15 analyzed HMP samples and by the four different annotation protocols.

HMP samples are numbered from 1 to 15 according to the list that appears in Methods. The different protocols are represented by color and shape. Note that two outlier protocols for sample 14 are not shown but were included in the PCA calculation.

Figure 6