Virus-specific capping of tobacco mosaic virus RNA : methylation of GTP prior to formation of covalent complex p126-m7GMPMerits, Andres; Kettunen, Reetta; Mäkinen, Kristiina; Lampio, Anja; Auvinen, Petri; Kääriäinen, Leevi; Ahola, TeroFEBS letters1999 / p. 45-48 http://dx.doi.org/10.1016/S0014-5793(99)00856-X