Loading plots for EG1 (A), EG2 (B), and EG3 (C) for the human tissue study. The squares are the muscles group, the diamonds are the brain group, and the triangles are the liver group. Although these groups were clearly defined, EA2 and EA3, as shown in Figure 8, had better separation and were used to develop these group signatures.
Rollins et al. BMC Bioinformatics 2006 7:377 doi:10.1186/1471-2105-7-377