Gene expression analysis. Hierarchic cluster (83 probe sets) highlighting gene expression differences among the cell lines OCI-Ly3, OCI-Ly10, and HLY-1 (ABC DLBCL cell lines); Karpas 422, DB, SUDHL10, SUDHL6, MIEU, and SUDHL4 (GCB DLBCL cell lines), and LIB (non-ABC cell line, which expressed the GCB markers CD10 and BCL6 together with the ABC marker IRF4).