title: Three-dimensional structure of pinwheel inclusions as determined by analytic geometry.
abstract: The three-dimensional ultrastructure of pinwheel inclusions found in two plant virus-host systems was determined by computer-assisted analytic geometry. Data obtained from electron micrographs of serially sectioned pinwheel inclusions were used to generate mathematical equations. The three-dimensional models described by the equations indicated that some pinwheels assume the hourglass shapes of elliptic hyperboloids. Electron micrographs obtained from thick sections of pinwheel inclusions tilted at various angles supported the elliptic hyperboloid models described by the mathematical equations.
authors.affiliation: Department of Plant Pathology, University of Kentucky, Lexington, Kentucky 40546, USA.
authors.forename: R L
authors.initials: RL
authors.lastname: Mernaugh
authors.forename: W S
authors.initials: WS
authors.lastname: Gardner
authors.forename: K L
authors.initials: KL
authors.lastname: Yocom