Dochi, T., Nakano, T., Mutsumi Inoue, M., Takamune, N., Shoji, S., Sano, K. and Misumi, S: Phosphorylation of human immunodeficiency virus type 1 capsid protein at serine 16, required for peptidyl-prolyl isomerase-dependent uncoating, is mediated by virion-incorporated extracellular signal-regulated kinase 2. J. Gen. Virol. 95, 1156–1166, 2014