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. Author manuscript; available in PMC: 2010 Jun 1.
Published in final edited form as: Dev Neurobiol. 2009 Jun;69(7):437–450. doi: 10.1002/dneu.20719

Figure 2.

Figure 2

PCA analysis of the 24 individual birds using all genes on the microarray. Relative distance between birds reflects overall similarity in gene profiles. Principle Components 1 and 2 (PC1 and PC2), suggest that age and song exposure condition, at least in adults, largely separate the samples.