title: Fine structure of the chorion of a moth, hyalophora cecropia.
abstract: The chorion of the moth Hyalophora cecropia has been found to consist primarily of a complex of proteins rendered insoluble by disulfide and hydrogen bonds. The bulk of the chorion is lamellate, and as in many cuticles each lamella contains a regular helicoidal series of microfibrils. The lamellar organization is disrupted in a central zone containing narrow irregular channels, and elsewhere the mature chorion is traversed by wide cylindrical channels. These open to the outer chorion surface indirectly via a porous trabeculate zone, and are distinct from the channels leading to the aeropyles, described elsewhere, in lacking cytoplasmic processes during their formation.
authors.affiliation: Papanicolaou Cancer Research Institute and Department of Medicine, University of Miami, Miami, Florida 33136.
authors.forename: D S
authors.initials: DS
authors.lastname: Smith
authors.forename: W H
authors.initials: WH
authors.lastname: Telfer
authors.forename: A C
authors.initials: AC
authors.lastname: Neville