Figure 1.

Principal component analysis (PCA) of microarray data set. Overall variation between the three cell types articular cartilage (AC; triangles), annulus fibrosus (AF; circles) and nucleus pulposus (NP; diamonds), where each spot represents an individual array, can be seen by the clustering within each cell type and the separation between the different cell types.

Minogue et al. Arthritis Research & Therapy 2010 12:R22   doi:10.1186/ar2929
Download authors' original image