title: Annulate lamellae in an undifferentiated mouse marrow cell.
abstract: Annulate lamellae have been observed in undifferentiated cells in the marrow of mice treated with urethan. They were not found in any recognizable hematopoietic element in either urethan- or saline-injected controls. The possibility has been raised that this cytoplasmic organelle is confined to the most primitive marrow cell and may be an identifying feature of 'stem cells'.
authors.affiliation: Department of Anatomy, University of Miami School of Medicine, Miami, Florida, U.S.A.
authors.forename: I
authors.initials: I
authors.lastname: Berman
authors.forename: C C
authors.initials: CC
authors.lastname: Stice