title: Studies on the structure of a coronavirus-avian infectious bronchitis virus.
abstract: When avian infectious bronchitis virus (IBV) is fixed in formaldehyde, negative stain is able to penetrate the particle and an internal component is visualized. This component is seen as a tongue or flask shaped structure attached at one point to the outer virus membrane. A model yielding transmission patterns similar to the virus has been made. Gradient centrifugation studies on IBV reveal that the RNP is associated with the internal sac.
mesh_terms: D003332:Coronaviridae / Q000648:ultrastructure*; D001351:Infectious bronchitis virus / Q000648:ultrastructure*; D008566:Membranes / Q000648:ultrastructure; D008961:Models, Structural; D014771:Virion / Q000648:ultrastructure