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Abstract
Summary
Differences in symptom expression and growth curve exist between two California strains, b and c of tobacco rattle virus, each of which possesses 3 components of different particle lengths and is serologically related to two English strains. With increasing age of infection from 3 to 35 days, the particle populations of strains b and c show a shift in the middle to bottom component ratio from about 2 to 0·9. An unstable 1600 to 1700 Å fraction recovered during periods of most rapid synthesis of the strain c may be implicated in the appearance of normally present 800 to 900 Å rods.
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© Society for General Microbiology 1967