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3'-terminal sequence of the plum pox virus PS and ŏ6 isolates: evidence for RNA recombination within the potyvirus group.
The sequence of the 3'-terminal 1768 nucleotides of the PS and ŏ6 isolates of plum pox virus (PPV) has been determined and compared with that of the equivalent regions of other PPV isolates sequencedExpand
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Proteolytic processing of the plum pox potyvirus polyprotein by the NIa protease at a novel cleavage site.
The expression of potyvirus genomic RNA takes place through translation of its unique long and functional open reading frame into a large polyprotein that undergoes extensive proteolytic processing.Expand
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Novel catalytic activity associated with positive-strand RNA virus infection: nucleic acid-stimulated ATPase activity of the plum pox potyvirus helicaselike protein.
The cylindrical inclusion protein of potyviruses contains the so-called nucleoside triphosphate binding motif, an amino acid sequence motif present in proteins encoded by most positive-strand RNAExpand
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Intracellular localization of three non-structural plum pox potyvirus proteins by immunogold labelling
Abstract The protein composition of cellular inclusions induced by the infection of Nicotiana cleuelandii with plum pox potyvirus was examined by immunogold electron microscopy of thin sections ofExpand
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Homologous potyvirus and flavivirus proteins belonging to a superfamily of helicase-like proteins.
Comparison of the nucleoside triphosphate-binding motif(NTBM)-containing proteins of two groups of apparently distantly related positive-strand RNA viruses (potyvirus and flavivirus), revealedExpand
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Properties of the active plum pox potyvirus RNA polymerase complex in defined glycerol gradient fractions.
As a first step in the study of the replication of plum pox virus (PPV) RNA, an in vitro virus-specific RNA polymerase activity was characterized in a crude membrane extract (Martin and Garcia,Expand
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Mutational analysis of plum pox potyvirus polyprotein processing by the NIa protease in Escherichia coli.
A binary Escherichia coli expression system has been used to study the pathway for proteolytic processing of the plum pox potyvirus (PPV) polyprotein. Trans cleavage at the carboxyl end of theExpand
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AN ULTRASTRUCTURAL STUDY OF PIT CONNECTIONS AND PERCURRENT PROLIFERATIONS IN THE RED ALGA NEMALION HELMINTHOIDES (VELL. IN WITH.) BATT.
SUMMARY Nemalion helminthoides exhibits considerable diversity in pit connection morphology. Their diameter ranges from 1.5 μm between fusion cells and the gametophyte, down to 0.3 μm on spermatialExpand
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Proteolytic activity of the plum pox potyvirus NIa‐protein on excess of natural and artificial substrates in Escherichia coli
The plum pox potyvirus (PPV) NIa protease expressed from a medium copy number plasmid was able to process an excess of substrate expressed from a high copy number plasmid, in a binary EscherichiaExpand
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Immunopathology of chickens infected in vivo and at hatching with the avian osteopetrosis virus MAV.2–0
The immunological capacity of chickens infected with MAV.2–0, an avian osteopetrosis virus, was studied both morphologically and functionally. Infection of 11 to 12‐day‐old embryos with a high (0.58Expand
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