Simian varicella virus gene 61 encodes a viral transactivator but is non-essential for in vitro replication.
Gray WL, Davis K, Ou Y, Ashburn C, Ward TM. Simian varicella virus gene 61 encodes a viral transactivator but is non-essential for in vitro replication. Arch Virol. 2007; 152(3):553-63.