6C-1 and 1-6B1 are outlier because of poor cRNA yield. 4A-1 (low cRNA yield too) and 4D-1 seems to have been switched during processing.
2D1 and 5A3 were also mistake (samples picked from the wrong well in the original 96 plates) as they seems to cluster with B samples (75% liver-25% Kidney).
 