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Isolates of citrus exocortis viroid recovered by host and tissue selection.
TLDR
A common pattern of nucleotide exchanges, described as a 'tomato signature', can be detected in all of the isolates derived from hybrid tomato tissues.
Physical properties of a minimal infectious RNA(viroik) associated with the exocortis disease.
Abstract Purification of the pathogenic RNA (viroid) from exocortis disease has been accomplished. Composition analysis indicates the absence of any DNA or protein and a molar nucleotide composition
A stable 463 nucleotide variant of citrus exocortis viroid produced by terminal repeats.
TLDR
A comparison of the sequence and structure of CEV D-92 with coconut cadang-cadang viroid revealed similarities in the regions generating the naturally occurring terminal repeats suggesting a possible preferred site for RNA recombination between viroids.
Exocortis virus: an infectious free-nucleic acid plant virus with unusual properties.
TLDR
Infectivity of the free-RNA exocortis virus from Gynura aurantiaca was maximal 40–60 days post-infection with the virus still recoverable after 140 days, suggesting the presence of a low molecular weight “tRNA-Like” or a RNA: DNA hybrid molecule for the infectious form of CEV.
Characterization of a segmented double-helical RNA from bacteriophage φ6
Abstract The nucleic acid component of bacteriophage φ6 is characterized as a double stranded RNA molecule with a buoyant density of 1.605 g/cm 3 and nucleotide composition of C, 27.3%; A, 21.8%; G,
Exocortis disease: evidence for a new species of "infectious" low molecular weight RNA in plants.
TLDR
Resistance of the 8–16S moiety to inactivation by heat or diethylpyrocarbonate further suggests the presence of ds regions, and this model is consistent with the low sedimentation coefficient and the susceptibility to RNAase.
Structure and conformation of low molecular weight pathogenic RNA from exocortis disease.
TLDR
On the basis of bouyant density distribution as well as thermal and dimethyl sulfoxide denaturation, molecular structures of the pathogenic RNA are presented, and possible functional significance is discussed.
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