Fig. 2
From: A comparative study of endoderm differentiation in humans and chimpanzees
General patterns in the data. a Normalized log2(CPM) expression measurements for all genes projected onto the axes of the first two PCs. Color indicates day. Shape represents species. PC1 is highly correlated with differentiation day (r = 0.92). PC2 is highly correlated with species (r = 0.93). b Box plots of normalized expression values for genes with known roles in endoderm development