Figure 1From: Removing batch effects from purified plasma cell gene expression microarrays with modified ComBat Principal component analysis. Scatter plot of Principal Component Analysis (PCA) of the 5,000 most variable probes across batches without transformation, transformed by ComBat, and transformed to the MIRT: Old Kit standard by M-ComBat. Grey data ellipse seen in ComBat panel represents untransformed MIRT: Old Kit. After transformation by M-ComBat, the differences in location between the batches has been eliminated and all batches coincide with the desired MIRT: Old Kit standard.Back to article page