Conformational Analysis of Macromolecules. IV. Helical Structures of Poly‐L‐Alanine, Poly‐L‐Valine, Poly‐β‐Methyl‐L‐Aspartate, Poly‐γ‐Methyl‐L‐Glutamate, and Poly‐L‐Tyrosine

1967 ◽  
Vol 46 (11) ◽  
pp. 4410-4426 ◽  
Author(s):  
Tatsuo Ooi ◽  
Roy A. Scott ◽  
Garret Vanderkooi ◽  
Harold A. Scheraga
Keyword(s):  
Conformational Analysis ◽  
Helical Structures

Studies of a Defective Measles Virus

1968 ◽  
Vol 26 ◽  
pp. 208-209
Author(s):  
R. M. McCombs ◽  
M. Benyesh-Melnick ◽  
J. P. Brunschwig
Keyword(s):  
Inclusion Bodies ◽  
Measles Virus ◽  
Giant Cells ◽  
Helical Structures ◽  
Thin Sections ◽  
Virus Particles ◽  
Extracellular Virus ◽  
Culture Cells ◽  
Infected Cells ◽  
Eosinophilic Inclusions

Measles virus is an agent that is capable of replicating in a number of different culture cells and generally causes the formation of multinucleated giant cells. As a result of infection, virus is released from the cells into the culture fluids and reinfection can be initiated by this cell-free virus. The extracellular virus has been examined by negative staining with phosphotungstic acid and has been shown to be a rather pleomorphic particle with a diameter of about 140 mμ. However, no such virus particles have been detected in thin sections of the infected cells. Rather, the only virus-induced structures present in the giant cells are eosinophilic inclusions (intracytoplasmic or intranuclear). These inclusion bodies have been shown to contain helical structures, resembling the nucleocapsid observed in negatively stained preparations.

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