Abstract
Tissue-cultured Aedes albopictus cells infected with morphologically homogeneous Sindbis virus were found to produce progeny virions which could be divided into three classes based on size. The thickness of the envelope was constant on all three sizes of progeny virions suggesting that the variability in size rested with the viral nucleocapsid. It is suggested that the three classes of virions have icosahedral nucleocapsids composed of common subunits organized in decreasing triangulation numbers.
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