Immunoblotting revealed phosphorylated IкB in U-RT1, as well as in the ABC DLBCL cell lines HBL-1, OCI-Ly3, and OCI-Ly10, while phosphorylation of IкB was absent in the GCB DLBCL cell lines OCI-Ly7, SUDHL4, and SUDHL6. This evidence concerns the gene ATP8A2 and aneurysmal bone cyst.