The 5' end group of tobacco mosaic virus RNA is m7G5' ppp5' Gp.

@article{Zimmern1975The5E,
  title={The 5' end group of tobacco mosaic virus RNA is m7G5' ppp5' Gp.},
  author={David Zimmern},
  journal={Nucleic acids research},
  year={1975},
  volume={2 7},
  pages={
          1189-201
        }
}
RNA extracted from CsC1-purified virions of tobacco mosaic virus is shown to give rise to an unusual nucleotide on digestion which RNAase T2, in addition to the four major nucleotides. This minor component has the electrophoretic characteristics of a phosphorylated end group, but is partially resistant to bacterial alkaline phosphatase. It is, however, a substrate for venom phosphodiesterase or nucleotide pyrophosphatase, yielding products which imply the structure m7G5'ppp5'Gp. TMV RNA, like… CONTINUE READING

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