Purity > 90% as determined by SDS-PAGE. MW: 19.8kDa. Partial: 1-142aa. N-terminal 10xHis-tagged. Epstein-Barr virus (strain B95-8) (HHV-4) (Human herpesvirus 4). Prevents premature death of the host cell during virus production, which would otherwise reduce the amount of progeny virus. Acts as a host B-cell leukemia/lymphoma 2 (Bcl-2) homolog, and interacts with pro-apoptotic proteins to prevent mitochondria permeabilization, release of cytochrome c and subsequent apoptosis of the host cell.