PCA of H3K4me3 and H3K27ac enrichment data.

<p>The percentage of the PC axis label is the fraction of variance that is explained by the PC. (A) Separation of the H3K4me3 enrichment data from 39 mice and 14 loci into two phenotypes: black are the socialized (n = 24) and red are the ostracized (n = 15) males. (B) Separation of the H3K27ac enrichment data from 41 mice and 14 loci into two phenotypes: black are the socialized (n = 25) and purple are the ostracized (n = 16) males. The dashed lines indicate the split into two groups that is used to test significance by permutation. (C) Correlation of PC1 prediction values from H3K4me3 enrichment and body weight. (D) Correlation of PC2 prediction values from H3K27ac enrichment and body weight. The black lines are linear regression lines and r is the Pearson's product-moment correlation; neither correlation was significant.