HDAC1 and cytomegalovirus infection: To determine whether the pUL29/28-pUL38-HDAC1 complex is formed during a defined time over the course of HCMV infection, i.e., when both viral constituents are clearly in the nucleus, we infected fibroblasts with BADinUL29F and collected whole cell lysates during the course of HCMV infection beginning at 6 hpi.