Proteolytic maturation of the turnip-yellow-mosaic-virus polyprotein coded in vitro occurs by internal catalysis.

@article{Morch1982ProteolyticMO,
  title={Proteolytic maturation of the turnip-yellow-mosaic-virus polyprotein coded in vitro occurs by internal catalysis.},
  author={M. D. Morch and Włodzimierz Zag{\'o}rski and A. L. Haenni},
  journal={European journal of biochemistry},
  year={1982},
  volume={127 2},
  pages={259-65}
}
The genomic RNA of turnip yellow mosaic virus is translated in vitro into two major high-molecular-weight proteins, the larger of which (Mr 195 000) undergoes post-translational cleavage. The mechanism of formation of the primary cleavage products (Mr 120 000 and Mr 78 000) of the 195 000-Mr protein has been examined. The fact that cleavage partly occurs at a rate insensitive to dilution of the 195 000-Mr protein is suggestive of an intramolecular mechanism of proteolytic maturation. 

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