Methyltransferase PRMT1 is a binding partner of HBx and a negative regulator of hepatitis B virus transcription. Benhenda S, Ducroux A, Rivière L, Sobhian B, Ward MD, Dion S, Hantz O, Protzer U, Michel ML, Benkirane M, Semmes OJ, Buendia MA, Neuveut C. J Virol. 2013 Apr;87(8):4360-71. doi: 10.1128/JVI.02574-12.