Figure 2.

Principal component analysis of the metabolite abundance profiles in 33 individuals. The analysis is based on 21 detected metabolites. Each point represents an individual. The colors indicate: blue, human controls; black, human schizophrenia patients; purple, chimpanzees; red, rhesus macaques.

Khaitovich et al. Genome Biology 2008 9:R124   doi:10.1186/gb-2008-9-8-r124
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