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Figure 1 | Arthritis Research & Therapy

Figure 1

From: Transcriptional profiling of bovine intervertebral disc cells: implications for identification of normal and degenerate human intervertebral disc cell phenotypes

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.

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